Male Reproductive

Cryptorchidism: workup and management

Clinical Overview and When to Suspect Cryptorchidism

— Normal descent completes by ~33 weeks gestation; postnatal descent can occur up to ~6 months corrected age, rarely beyond

— After 6 months, spontaneous descent is extremely unlikely → surgical planning window opens

— ~3% of full-term male newborns, up to 30% of preterm infants (testes descend last trimester)

— By 1 year, prevalence drops to ~1% — matches adult prevalence

— Right side more commonly affected; ~10–15% bilateral

— Newborn exam: "empty hemiscrotum" or "testis not palpable in scrotal sac"

— Well-child visit at 6 months: previously documented descended testis now non-palpable → consider ascending testis

— Older boy with infertility workup, testicular cancer, or inguinal hernia → ask about prior orchiopexy

— Bilateral non-palpable testes + hypospadias or ambiguous genitalia → disorder of sex development (DSD) until proven otherwise

— Prematurity, low birth weight, small for gestational age

— Maternal smoking, gestational diabetes

— Family history (first-degree relative)

— Syndromic: Prader-Willi, Kallmann, Klinefelter, Noonan

— Subfertility (impaired germ cell maturation if testis stays warm/intra-abdominal)

— Testicular germ cell cancer risk (2–8× baseline, higher with intra-abdominal location); orchiopexy lowers but does not eliminate risk and allows future self-exam

Board pearl: Bilateral non-palpable testes in a phenotypic male newborn = endocrine/genetic emergency — rule out congenital adrenal hyperplasia (virilized 46,XX female) before assigning sex; obtain karyotype, 17-OHP, and electrolytes urgently.

Definition: failure of one or both testes to descend into the dependent scrotum by the expected age; encompasses true undescended, ectopic, ascending (acquired), and retractile variants

Epidemiology:

When to suspect on a Step 3 stem:

Risk factors:

Why it matters (the two board reasons to fix it):

Presentation Patterns and Key History

— Document whether testis was ever palpated in scrotum — critical for distinguishing congenital vs acquired/ascending

— Note prematurity, birth weight, maternal exposures, family history of cryptorchidism or testicular cancer

— Re-examine; if testis still not in scrotum and was previously undescended, this is the trigger for urology referral

— Spontaneous descent after 6 months corrected age is rare → do not "watch" further

— Boy 4–10 years old; testis previously documented in scrotum now sits in inguinal canal

— Mechanism: failure of spermatic cord to elongate with somatic growth

— Often unilateral; still warrants orchiopexy because of same fertility/oncologic concerns

— Hyperactive cremasteric reflex pulls testis into superficial inguinal pouch

— Can be manipulated into dependent scrotum and stays there without tension

— Annual monitoring only; ~30% become ascending and need surgery

— Adolescent with inguinal mass + empty scrotum → could be undiagnosed undescended testis with malignancy

— Adult infertility evaluation revealing azoospermia + history of late orchiopexy

— Acute pain in inguinal region in patient with known cryptorchidism → consider torsion of undescended testis (higher risk)

— Was the testis ever seen/felt in the scrotum? When?

— Any prior groin surgery (hernia repair can iatrogenically trap a testis)?

— Family history of cryptorchidism, infertility, testicular cancer, hypospadias

— Pubertal milestones if older child; anosmia (Kallmann clue)

Key distinction: Retractile = brought down, stays down, normal exam → observe. Ascending = was down, now up, won't stay → refer for orchiopexy. Congenital undescended = never down → refer by 6 months.

Newborn nursery: routine exam reveals empty or hypoplastic-appearing hemiscrotum

6-month well-child visit (the pivotal Step 3 timepoint):

Ascending (acquired) testis:

Retractile testis (do not over-treat):

Older presentations:

Key history questions:

Physical Exam Findings and Localization

— Warm room, warm hands; child supine, frog-legged, then standing/squatting for older boys

— Soap or lubricant on examiner's fingers reduces cremasteric activation

— Examine the non-affected side first to gauge baseline size

— Start at the anterior superior iliac spine, sweep firmly along the inguinal canal toward the pubic tubercle and into the scrotum

— Other hand receives the testis at the external ring

— If palpated, attempt to bring it to the dependent scrotum without tension — if it stays, retractile; if it springs back, undescended or ascending

— Palpable (~80%): inguinal canal, suprascrotal, high scrotal, or ectopic (femoral, perineal, contralateral scrotum, prepenile)

— Non-palpable (~20%): intra-abdominal, inguinal but obscured, atrophic ("vanishing testis"), or absent

— A small, soft contralateral testis with a non-palpable testis on the other side suggests monorchia (vanishing testis) — but never assume without surgical confirmation

— Hypospadias + cryptorchidism (especially bilateral) → DSD workup mandatory

— Inguinal hernia (patent processus vaginalis coexists in most cases)

— Micropenis → suggests hypogonadotropic hypogonadism

— Dysmorphic features → Prader-Willi, Noonan, Kallmann

— Generally none — but in bilateral non-palpable testis newborn, check for salt-wasting CAH signs: poor feeding, vomiting, dehydration, hyperpigmentation, hyponatremia/hyperkalemia

Step 3 management: A single thorough exam by a clinician experienced in pediatric GU is more accurate than imaging. If you cannot palpate the testis confidently, the next step is urology referral — not ultrasound.

Setup matters:

Technique — "milking" the inguinal canal:

Classify by location (drives management):

Compare testicular size:

Look for associated findings:

Hemodynamic/systemic:

Diagnostic Workup — Initial Labs and Imaging

— Ultrasound, CT, and MRI have poor sensitivity/specificity for locating non-palpable testes and do not change management

— AUA and AAP guidelines: do not order imaging before urology referral for an isolated non-palpable testis

— Imaging delays definitive care (diagnostic laparoscopy is both diagnostic and therapeutic)

— Karyotype — confirm 46,XY; rule out virilized 46,XX with CAH

— 17-hydroxyprogesterone — screen for 21-hydroxylase deficiency

— Serum electrolytes — hyperkalemia, hyponatremia in salt-wasting CAH

— LH, FSH, testosterone, AMH (anti-Müllerian hormone), inhibin B

· Elevated LH/FSH + low testosterone + low AMH/inhibin B = anorchia (no testicular tissue)

· Detectable AMH/inhibin B = functional testicular tissue present somewhere → surgical exploration warranted

— hCG stimulation test (older protocol): rise in testosterone confirms functional Leydig cells; largely replaced by AMH/inhibin B

— Pelvic/abdominal ultrasound looking for Müllerian structures (uterus) is appropriate here — different indication than localization

— Endocrinology + genetics + urology multidisciplinary team

— No labs needed; clinical diagnosis → refer

— Standard pediatric pre-anesthesia evaluation; no routine bloodwork in healthy child

Board pearl: If a question stem says "non-palpable testis at 6 months, what is the next step?" the answer is referral to pediatric urologist, not ultrasound, not CT, not MRI. Imaging is a distractor in ~every cryptorchidism vignette.

Key distinction: Labs (karyotype, 17-OHP, AMH) are for bilateral non-palpable or suspected DSD — not for routine unilateral cryptorchidism.

The big Step 3 trap: imaging is NOT routinely indicated

Exceptions where labs/imaging matter:

Bilateral non-palpable testes (any age):

Suspected DSD or ambiguous genitalia:

Older child with acquired/ascending testis:

Pre-op (before orchiopexy):

Diagnostic Workup — Advanced and Confirmatory Studies

— Performed by pediatric urologist under general anesthesia

— Three possible findings drive intraoperative decision:

1. Intra-abdominal testis → orchiopexy (single-stage or staged Fowler-Stephens)

2. Blind-ending vas and vessels (vanishing testis) → no further exploration needed

3. Vas/vessels entering internal ring → groin exploration; may find nubbin (atrophic remnant) → excise to prevent malignancy in residual germ cells

— Particularly useful in bilateral non-palpable testes to avoid unnecessary laparoscopy

— Undetectable AMH + elevated FSH in infancy strongly suggests bilateral anorchia → no surgical exploration needed

— Detectable AMH → tissue exists → explore

— Administer hCG; measure testosterone response

— Rise indicates functional Leydig cells (testicular tissue present)

— Now largely supplanted by AMH but may appear on older boards

— MRI occasionally for syndromic patients or post-surgical recurrence planning; still not first-line

— Ultrasound may be used for obese adolescents where inguinal palpation is difficult, but does not exclude intra-abdominal testis if negative

— Indicated for bilateral cryptorchidism + other anomalies, syndromic features, or atypical genitalia

— Microarray, karyotype, targeted panels (e.g., INSL3, RXFP2, AR)

— For men with history of cryptorchidism presenting with infertility

— Bilateral history → ~50% azoospermia/oligospermia; unilateral → ~10%

CCS pearl: On a CCS-style case, advancing the clock past 6 months without surgical referral for a persistently undescended testis will cost you points; the order is urology referral → diagnostic laparoscopy if non-palpable → orchiopexy.

Diagnostic laparoscopy — the gold standard for non-palpable testis:

AMH and inhibin B (biochemical "is there a testis?"):

hCG stimulation test:

Imaging — limited niche roles:

Genetic testing:

Semen analysis (in adulthood):

Risk Stratification and Management Logic

— Observe from birth to 6 months corrected age for spontaneous descent

— If undescended at 6 months → refer to pediatric urologist

— Orchiopexy ideally performed between 6 and 18 months of age

— Earlier surgery (by 18 months) improves spermatogonial preservation and likely lowers cancer risk

— Germ cell apoptosis and impaired transformation of gonocytes to adult dark spermatogonia begin in the first year

— Histologic damage is largely irreversible after 2 years

— Palpable undescended testis:

· Standard inguinal orchiopexy with creation of dartos pouch

· Often combined with herniorrhaphy (patent processus vaginalis present in majority)

— Non-palpable testis:

· Diagnostic laparoscopy first

· If viable intra-abdominal testis close to internal ring → single-stage laparoscopic orchiopexy

· If high intra-abdominal testis with short vessels → Fowler-Stephens procedure (ligate testicular vessels, rely on collateral vasal/cremasteric supply; can be single or two-staged ~6 months apart)

· If atrophic nubbin → excise

— Post-pubertal/adolescent unilateral undescended testis with normal contralateral testis:

· Orchiectomy generally preferred (cancer risk, poor fertility contribution, ease of self-exam in scrotal position is lost)

· Bilateral case in adolescent → individualize; may attempt orchiopexy to preserve hormonal function

— Not recommended by AUA/AAP as primary treatment — low success, possible germ cell toxicity

— European guidelines list it as optional adjunct; not the answer on US boards

Step 3 management: If a stem asks about a 9-month-old with persistent unilateral undescended testis, the answer is orchiopexy between now and 18 months, not hormonal therapy and not continued observation.

Timing — the central Step 3 concept:

Why not wait longer?

Classification driving surgical approach:

Hormonal therapy (hCG, GnRH):

Pharmacotherapy and Hormonal Considerations

— Stimulates Leydig cells → testosterone surge → may promote descent in hormonally responsive cases

— Success rates 15–20%, with frequent relapse

— Side effects: scrotal pigmentation, pubic hair, penile growth, behavioral changes, possible germ cell apoptosis

— Historical/diagnostic role (hCG stimulation test) more relevant than therapeutic role

— Intranasal formulations used in Europe; not FDA-approved for cryptorchidism in US

— Similar modest efficacy; possibly favorable effect on fertility index in some studies, but evidence weak

— Investigational: short-course GnRH analogue after surgery to enhance germ cell maturation; not standard of care

— Kallmann syndrome / congenital hypogonadotropic hypogonadism: pulsatile GnRH or gonadotropin therapy may induce descent and promote fertility — different scenario, addressed by endocrinology

— Hypopituitarism: replace deficient axes

— Standard pediatric post-op pain control: acetaminophen scheduled, ibuprofen if >6 months, caudal or ilioinguinal block intraoperatively

— Avoid codeine in children (FDA boxed warning, ultra-rapid metabolizers)

— Routine antibiotic prophylaxis not required for clean orchiopexy

— Bilateral anorchia or post-bilateral orchiectomy: testosterone replacement starting at age-appropriate puberty, managed by pediatric endocrinology

— Monitor growth, bone age, virilization milestones

Board pearl: If a Step 3 stem offers "intranasal GnRH" or "intramuscular hCG" as the management answer for routine cryptorchidism, it is a distractor. The correct answer is orchiopexy.

Primary message for US boards: cryptorchidism is a surgical disease. Hormonal therapy is not first-line and is not recommended by the AUA.

hCG (human chorionic gonadotropin):

GnRH (gonadotropin-releasing hormone) analogues:

Post-orchiopexy hormonal adjuncts:

Hormonal therapy when DSD or hypogonadotropic hypogonadism is identified:

Analgesia and perioperative meds:

Future testosterone replacement:

Surgical Management — Orchiopexy in Depth

— Inguinal incision over external ring

— Mobilize spermatic cord; ligate patent processus vaginalis (hernia sac) high at internal ring

— Achieve tension-free length to scrotum (may require retroperitoneal dissection of cord)

— Create subdartos pouch in scrotum; deliver testis and secure between dartos and skin

— Day surgery; outpatient discharge same day

— Diagnostic first → therapeutic depending on findings

— Single-stage laparoscopic orchiopexy for intra-abdominal testis within reach

— Fowler-Stephens (staged):

· Stage 1: clip/divide testicular vessels laparoscopically → testis survives on collateral vasal artery and cremasteric supply

· Stage 2 (~6 months later): mobilize testis on collateral pedicle, bring to scrotum

· Two-stage success ~85–90%; single-stage Fowler-Stephens ~75%

— Atrophic nubbin found

— Post-pubertal patient with normal contralateral testis

— Non-viable testis at exploration

— Testicular atrophy (~1–2% standard; up to 10–25% with Fowler-Stephens)

— Recurrent ascent / re-do orchiopexy

— Hematoma, wound infection (low rates)

— Vas deferens injury, ilioinguinal nerve injury

— Damage to contralateral hernia structures

— Avoid straddle toys, ride-on toys for 2–4 weeks

— No baths for ~48 hours; sponge bathing

— Acetaminophen ± ibuprofen for pain

— Follow-up at ~1 month and again at 6–12 months to confirm testis position and viability

— Surgical emergency; explore promptly — may present as inguinal pain/mass

CCS pearl: Order sequence for non-palpable testis case: Pediatric urology consult → NPO → general anesthesia consent → diagnostic laparoscopy → proceed to orchiopexy or Fowler-Stephens stage 1 based on findings → post-op pain control → discharge same day with follow-up at 4 weeks.

Inguinal orchiopexy (palpable testis) — standard operation:

Laparoscopic approach (non-palpable testis):

Orchiectomy indicated when:

Complications of orchiopexy:

Post-op care:

Special: torsion of undescended testis:

Special Populations — Preterm Infants and Comorbidities

— Up to 30% have undescended testes at birth; most descend in first months as the infant reaches term-equivalent age

— Use corrected gestational age for the 6-month surgical threshold, not chronological age

— Anesthesia risks higher in former preemies <60 weeks post-conceptual age → coordinate timing with anesthesia

— Higher persistence rate; closer follow-up at 3 and 6 months

— Coexisting inguinal hernia rates very high — combined repair common

— Prader-Willi: central hypogonadism + cryptorchidism; orchiopexy still indicated; coordinate with endocrinology for later hormonal therapy

— Noonan syndrome: ~60–80% of affected males have cryptorchidism

— Klinefelter (47,XXY): can have cryptorchidism; will require testosterone replacement at puberty regardless; consider sperm preservation strategies in adolescence

— Kallmann syndrome: anosmia + hypogonadotropic hypogonadism → endocrinology workup; may respond to gonadotropin therapy

— Not directly relevant to cryptorchidism pathology, but affects perioperative drug dosing (acetaminophen in hepatic disease, NSAIDs avoided in renal disease)

— Adolescents with previously unrecognized cryptorchidism: discuss orchiectomy vs orchiopexy

— Fertility unlikely from that testis; cancer surveillance is the chief concern

— Counsel about self-examination after orchiopexy (testis is now palpable in scrotum)

— Lifelong testicular self-exam education

— Semen analysis if fertility issues

— No specific imaging surveillance recommended; clinical exam annually if accessible

— Worse fertility prognosis; consider early endocrinology involvement

— In adolescents, discuss sperm cryopreservation if feasible before further intervention

Key distinction: In preterm infants, the 6-month clock starts at corrected age, giving more time for spontaneous descent — do not rush to surgery at 6 chronological months in a 28-week ex-preemie.

Preterm infants:

Low birth weight / SGA infants:

Syndromic and complex patients:

Renal/hepatic impairment:

Older child / adolescent identified late:

Adults with prior cryptorchidism:

Bilateral cases:

Special Populations — DSD, Bilateral Non-Palpable, and Anorchia

— Treat as a DSD until proven otherwise

— Immediate workup before sex assignment confirmation:

· Karyotype (rapid FISH for SRY)

· 17-hydroxyprogesterone (CAH)

· Serum electrolytes, glucose

· LH, FSH, testosterone, AMH, inhibin B

· Pelvic ultrasound for Müllerian structures

— Multidisciplinary team: pediatric urology, endocrinology, genetics, neonatology, ethics, mental health

— 46,XX virilized female with severely ambiguous genitalia and "bilateral cryptorchidism"

— Salt-wasting crisis at 1–2 weeks: vomiting, hyponatremia, hyperkalemia, hypotension

— Treatment: hydrocortisone + fludrocortisone + saline; later surgical management of genitalia with shared decision-making

— 46,XY with normally formed male external genitalia (testes functioned in fetal life then regressed)

— Elevated LH/FSH, low testosterone, undetectable AMH and inhibin B

— No surgical exploration needed if biochemistry is definitive

— Plan testosterone replacement at puberty; testicular prostheses optional for psychosocial reasons

— 46,XY with cryptorchidism + uterus/fallopian tubes found at surgery

— AMH receptor or AMH gene mutation

— Manage with orchiopexy ± Müllerian remnant removal; preserve fertility structures where possible

— Counsel that unilateral history confers near-normal paternity rates; bilateral history reduces success significantly

— Discuss assisted reproductive options (TESE, ICSI) if azoospermic

Board pearl: Bilateral non-palpable testes + hypospadias = DSD workup before assigning male sex. Missing CAH in this setting can be lethal — salt-wasting crisis kills neonates within the first 2 weeks.

Bilateral non-palpable testes in a newborn — the "do not miss" scenario:

Congenital adrenal hyperplasia presenting this way:

True bilateral anorchia ("vanishing testes syndrome"):

Persistent Müllerian duct syndrome:

Adolescents with prior orchiopexy considering family planning:

Complications and Long-Term Adverse Outcomes

— Unilateral cryptorchidism: paternity rates ~90% (near baseline)

— Bilateral cryptorchidism: paternity rates ~65%; azoospermia in up to 50% if untreated or late-treated

— Mechanism: impaired transformation of gonocytes to adult dark spermatogonia in warm intra-abdominal/inguinal environment

— Lifetime risk 2–8× general population (general baseline ~0.4%)

— Highest risk for intra-abdominal testes; lower for inguinal

— Seminoma is the most common histology in undescended testes

— Orchiopexy before puberty reduces but does not eliminate risk; surgery also makes the testis examinable for self-screening

— Contralateral normally descended testis also has modestly increased risk

— Increased risk in undescended testes due to abnormal fixation

— Present as inguinal/abdominal pain with empty hemiscrotum — easy to misdiagnose as appendicitis or hernia incarceration

— Patent processus vaginalis coexists in most congenital cryptorchidism cases

— Repaired concurrently at orchiopexy

— Post-orchiopexy: 1–2% standard, up to 25% after Fowler-Stephens

— Vascular injury during cord mobilization is the chief mechanism

— Body image concerns in adolescents with monorchism or testicular prosthesis decisions

— Anxiety about fertility and cancer risk — needs proactive counseling

— Hypogonadism may develop, requiring testosterone replacement

— Monitor pubertal progression closely in bilateral history

— ~1–2% of orchiopexies need redo; higher in older patients and complex cases

Step 3 management: Counsel every post-orchiopexy adolescent and adult on monthly testicular self-examination starting at puberty — this is the cornerstone of long-term cancer surveillance, since no imaging surveillance is recommended.

Subfertility / infertility:

Testicular germ cell cancer:

Testicular torsion:

Inguinal hernia:

Testicular atrophy:

Psychosocial:

Hormonal consequences (bilateral cases):

Recurrent ascent:

When to Escalate Care and Consult

— Persistent undescended testis at 6 months corrected age (unilateral or bilateral)

— Ascending/acquired testis identified at any well-child visit

— Newly non-palpable testis after prior documentation of descent

— Any retractile testis that does not stay in dependent scrotum

— Hypospadias + any degree of cryptorchidism

— Bilateral non-palpable testes (urgent, not routine)

— Inguinal hernia + undescended testis (combined repair)

— Bilateral non-palpable testes (concurrent with urology)

— Cryptorchidism + micropenis

— Cryptorchidism + dysmorphic features or suspected syndrome

— Suspected hypogonadotropic or hypergonadotropic states

— Pubertal delay in patient with history of bilateral cryptorchidism

— Bilateral cryptorchidism with other anomalies

— Suspected DSD or chromosomal abnormality

— Family history suggesting syndromic etiology

— Newborn with bilateral non-palpable testes + signs of salt-wasting crisis (vomiting, lethargy, hyperkalemia) → emergent endocrinology + NICU

— Suspected torsion of an undescended testis (acute inguinal/abdominal pain with empty hemiscrotum) → emergent urology and OR

— Incarcerated inguinal hernia with undescended testis → emergent surgery

— Bilateral non-palpable testes with ambiguous genitalia: convene urology, endocrinology, genetics, neonatology, mental health/social work, ethics — do not assign sex unilaterally in the nursery

— Adolescents with cryptorchidism history transitioning to adult care: provide a written summary including operative reports, laterality, histology, fertility counseling notes, and self-exam instructions

CCS pearl: Missing the 6-month referral window is a frequent CCS deduction — schedule the urology consult at the 6-month well-child visit, not after multiple ultrasounds.

Pediatric urology referral indications:

Pediatric endocrinology referral:

Genetics referral:

Emergency consultation (same-day or ED transfer):

Multidisciplinary DSD team:

Transition of care:

Key Differentials — Within the Empty Scrotum Category

— Hyperactive cremasteric reflex pulls testis up; can be brought to scrotum and remains there without tension

— Common in ages 1–10; usually resolves at puberty

— Management: annual exam, no surgery unless converts to ascending

— ~30% lifetime risk of becoming ascending → monitor

— Previously documented descended testis now sits higher

— Same management as congenital cryptorchidism: orchiopexy

— Testis exited inguinal canal but landed in abnormal location: superficial inguinal pouch, femoral, perineal, prepenile, or contralateral scrotum

— Palpable; managed with orchiopexy

— Prenatal vascular accident (often in-utero torsion); leaves nubbin or blind-ending vessels

— Found on diagnostic laparoscopy; nubbin excised to remove any residual germ cells

— Contralateral testis often hypertrophied at birth → compensatory finding

— Absent testicular tissue; confirm with undetectable AMH/inhibin B + elevated FSH/LH

— No surgical exploration if biochemistry is definitive

— After inguinal hernia repair, testis may be inadvertently fixed in canal

— History of prior groin surgery is the clue

— 46,XX with CAH and severe virilization — labioscrotal folds appear as "empty scrotum"

— 46,XY DSDs with intra-abdominal testes (CAIS, PAIS, 5α-reductase deficiency)

Key distinction: The single most important board distinction is retractile vs ascending vs true undescended — exam maneuver (does it stay in the scrotum when brought down without tension?) is the determinant, not imaging.

Retractile testis:

Ascending (acquired) testis:

Ectopic testis:

Atrophic/vanishing testis:

Anorchia (bilateral):

Iatrogenic (post-surgical) trapped testis:

DSD-associated apparent cryptorchidism:

Key Differentials — Outside the Cryptorchidism Category

— Bulge in inguinal/scrotal region, often with crying or straining

— May coexist with cryptorchidism (shared patent processus vaginalis pathophysiology)

— Incarcerated hernia is a surgical emergency

— Communicating: fluid moves between peritoneum and tunica vaginalis through patent processus → transilluminates, fluctuates in size

— Non-communicating: stable fluid in tunica vaginalis

— Testis is present in scrotum; differentiates from cryptorchidism easily on exam

— Adolescent presentation, "bag of worms" superior to testis, left-sided predominance

— Not in the differential of empty scrotum but appears on testicular question stems

— Acute scrotal pain, high-riding testis, absent cremasteric reflex

— Different from torsion of undescended testis (presents with inguinal/abdominal pain + empty hemiscrotum)

— Painful, swollen testis with relief on elevation (Prehn sign)

— Testis is palpable in scrotum

— Painless testicular mass; consider especially in patient with history of cryptorchidism even after orchiopexy

— Adolescent/young adult age group

— Ambiguous genitalia; bilateral non-palpable gonads with abnormal phallus

— Mandatory multidisciplinary workup before assigning sex

— Atrophic testis after prior torsion or surgery may mimic primary cryptorchidism on exam — careful history is key

Board pearl: If a vignette describes an acute inguinal pain in a boy with known cryptorchidism, think torsion of undescended testis — and order immediate surgical exploration, not ultrasound that delays definitive care.

Inguinal hernia (incarcerated or reducible):

Hydrocele:

Varicocele:

Testicular torsion (descended testis):

Epididymo-orchitis:

Testicular tumor:

Disorders of sex development:

Trauma / post-surgical changes:

Long-Term Plan and Counseling After Orchiopexy

— Activity restriction: no straddle toys, bicycles, ride-on toys for 2–4 weeks

— Wound care: keep clean and dry; sponge bathe ×48 hours then routine bathing

— Pain control: scheduled acetaminophen, ibuprofen if appropriate; expect resolution in 3–5 days

— Watch for warning signs: fever, expanding scrotal swelling, persistent pain, wound drainage

— Confirm wound healing

— Palpate testis in scrotal pouch

— Review activity progression

— Re-examine testis: position, size, consistency

— Compare to contralateral testis for atrophy (most likely time to detect ischemic atrophy)

— Document outcome in chart; communicate to PCP

— Annual exam at well-child visits documenting bilateral scrotal testes

— No imaging surveillance recommended

— Coordinate with PCP — operative report copy in chart

— Teach monthly testicular self-examination starting at puberty

— Counsel on increased lifetime testicular cancer risk (even after orchiopexy)

— Discuss fertility realistically: unilateral ≈ near-normal; bilateral ≈ reduced

— Offer sperm cryopreservation discussion in adolescents with bilateral history before fertility-threatening interventions

— Provide written summary: laterality, age at surgery, surgical approach, complications, current testicular status

— Recommend a primary care provider familiar with testicular cancer surveillance

— Address psychosocial concerns: body image, fertility anxiety, prosthesis options if orchiectomy was performed

— Bilateral history with infertility → refer to reproductive urology

— Options: TESE (testicular sperm extraction) + ICSI, donor sperm, adoption counseling

Step 3 management: The two lifelong habits you teach every cryptorchidism patient at puberty are (1) monthly testicular self-exam and (2) prompt evaluation of any new testicular mass — these replace any need for routine imaging surveillance.

Immediate post-op (first month):

First post-op visit (~4 weeks):

6–12 month post-op visit:

Longitudinal pediatric follow-up:

Puberty and adolescence:

Adult transition of care:

Family planning support:

Follow-Up, Monitoring, and Rehabilitation

— Newborn: exam at birth, 1 month, 2 months

— Persistent undescended at 6 months → urology referral

— Orchiopexy ideally 6–18 months of age

— Post-op visits at 1 month and 6–12 months

— Annual well-child exams thereafter with documented scrotal exam

— Testicular position (dependent scrotum vs ascended)

— Testicular size and consistency (compare bilaterally)

— Wound appearance early; cosmetic appearance later

— Growth and pubertal staging in older children (Tanner stages)

— Testis seemingly re-ascended → possible recurrent cryptorchidism

— Shrinking testis → atrophy

— New mass → testicular cancer

— Toddlers: parents understand activity restrictions

— School age: hygiene, body autonomy, age-appropriate explanation of past surgery

— Adolescents: self-exam technique, cancer risk awareness, fertility expectations, mental health screening

— Young adults: fertility planning, family history counseling for future offspring

— Ensure operative report uploaded to chart accessible to PCP

— Use a transition-of-care summary at age 18 (or whenever moving to adult provider)

— Generally none — orchiopexy is minor and full recovery in weeks

— Psychological support if body image distress, fertility concerns, or adolescent identification of late orchiectomy

— School/sports clearance typically at 4 weeks

— Proportion of orchiopexies performed by 18 months of age (target)

— Documentation of testicular self-exam education at adolescent well visits

— Follow-up rate at 1 year post-op

Board pearl: Recurrent ascent after orchiopexy occurs in 1–2% and is detected at the 6–12 month post-op exam — this is why that visit is non-negotiable, even if the family considers it routine.

Monitoring schedule summary:

Parameters to track at each follow-up:

Red flags requiring earlier evaluation:

Counseling content (verify at each visit, age-appropriate):

Documentation and care coordination:

Rehabilitation needs:

Quality metrics relevant to Step 3 systems thinking:

Ethical, Legal, and Patient Safety Considerations

— Newborn with bilateral non-palpable testes + atypical genitalia → do not assign sex unilaterally

— Multidisciplinary team approach: urology, endocrinology, genetics, neonatology, mental health, ethics, parents

— Defer irreversible surgical decisions on external genitalia when possible; engage in shared decision-making with parents

— Cultural and family values must be elicited respectfully

— Consent obtained from parents/legal guardians for orchiopexy in minors

— Adolescent assent (typically age 7+) should be sought, especially for adolescents undergoing orchiectomy where body image and fertility are concerns

— Discuss alternatives (observation if borderline), risks (atrophy, recurrence), benefits (fertility, cancer surveillance, cosmesis)

— Cryptorchidism itself is not reportable

— But evaluation may reveal suspected abuse (genital injury, inconsistent history) → mandated reporter obligations apply

— Children with cryptorchidism are at risk for being lost to follow-up between pediatric surgery and adult primary care

— Operative documentation must travel with the patient; transition summary at age 18 is a Step 3-flavored quality measure

— Adolescents need explicit handoff including cancer surveillance plan and self-exam education

— Wrong-site surgery is a never-event; mark the correct side preoperatively with patient/family confirmation

— Bilateral cases: confirm both sides on consent and time-out

— Anesthesia risk in former preemies <60 weeks post-conceptual age — coordinate timing

— Adolescents may want fertility and self-exam discussions held privately

— Respect age-appropriate confidentiality while complying with parental notification laws

— Delayed orchiopexy (after 2 years) is more common in under-resourced populations → systems-level concern; PCP advocacy for timely referral matters

Step 3 management: A 14-year-old with previously undocumented unilateral cryptorchidism asks that his parents not be told about fertility implications — discuss confidentiality limits, address his concerns directly, and encourage but not force family involvement, while ensuring informed consent for surgery includes parental authority for minors.

DSD and sex assignment ethics (the cornerstone case):

Informed consent edge cases:

Mandatory reporting:

Patient safety in transitions of care:

Perioperative safety:

Confidentiality in adolescents:

Equity and access:

High-Yield Associations and Rapid-Fire Facts

— 3% of full-term male newborns

— 30% of preterm male newborns

— 1% prevalence by age 1 year

— 6 months corrected age = referral trigger

— 6–18 months = ideal orchiopexy window

— 2–8× increased testicular cancer risk

— Seminoma = most common malignancy in undescended testis

— Testicular descent: transabdominal phase (INSL3-mediated) then inguinoscrotal phase (androgen-mediated, gubernaculum)

— Most testes descend in last trimester

— Right side > left side affected

— Prader-Willi: hypotonia, hyperphagia, cryptorchidism

— Noonan syndrome: short stature, pulmonary stenosis, cryptorchidism

— Klinefelter (47,XXY): tall, gynecomastia, small firm testes, possible cryptorchidism

— Kallmann: anosmia + hypogonadotropic hypogonadism + cryptorchidism

— Bardet-Biedl, Smith-Lemli-Opitz, Beckwith-Wiedemann

— Always ligate patent processus vaginalis at orchiopexy

— Subdartos pouch is the standard scrotal fixation

— Fowler-Stephens for high intra-abdominal testes — staged preferred (better viability)

— Imaging does not localize non-palpable testis reliably → laparoscopy

— Hormonal therapy is not first-line in US

— Retractile testes are not treated surgically

— Post-pubertal unilateral undescended testis with normal contralateral side → orchiectomy

— Self-exam at puberty

— Cancer risk persists despite orchiopexy

— Bilateral history = real fertility implications

— Salt-wasting crisis at 1–2 weeks of life

— Hyponatremia, hyperkalemia, hypoglycemia

— 17-OHP elevated; treat with hydrocortisone + fludrocortisone + saline

Board pearl: "Bilateral non-palpable testes in a phenotypic male newborn" → reflexively answer karyotype + 17-OHP + electrolytes + AMH before considering surgery.

The numbers to memorize:

Anatomy/embryology:

Genetic and syndromic associations (rapid fire):

Surgical pearls:

Don't-be-fooled facts:

Lifetime counseling:

CAH must-knows:

Board Question Stem Patterns

— "A 6-month-old boy has a non-palpable right testis. Left testis is in the scrotum. What is the next best step?"

— Answer: Refer to pediatric urologist (NOT ultrasound, NOT hCG, NOT continued observation)

— "A 4-year-old boy is brought to the clinic because the father cannot always feel both testes. On exam, the left testis is initially in the inguinal region but can be brought to the dependent scrotum and remains without tension. What is the next step?"

— Answer: Reassurance and annual follow-up (retractile testis)

— "A newborn boy has bilateral non-palpable testes and severe hypospadias. What is the most appropriate next step?"

— Answer: Karyotype, 17-OHP, electrolytes, and pelvic ultrasound — DSD workup before any sex assignment confirmation

— "Apparent male newborn with bilateral non-palpable testes presents at 2 weeks with vomiting and lethargy. Sodium 125, potassium 6.8."

— Answer: 21-hydroxylase deficiency (CAH) in virilized 46,XX female — give hydrocortisone, fluids; obtain karyotype

— "A 17-year-old presents with an inguinal mass on the side where his right testis has been absent from the scrotum since birth."

— Answer: Orchiectomy (high cancer risk, low fertility yield, normal contralateral testis)

— "A 7-year-old previously had bilateral descended testes at 3 years. Now the left testis sits at the external ring and springs back when released."

— Answer: Refer for orchiopexy

— "A 12-year-old with history of right cryptorchidism presents with acute right lower quadrant pain and an empty right hemiscrotum."

— Answer: Immediate surgical exploration (torsion of undescended testis)

— "What lifelong recommendation should be given to this patient after successful orchiopexy?"

— Answer: Monthly testicular self-examination starting at puberty

Key distinction: When a stem mentions ultrasound as an option, it is almost always a distractor in cryptorchidism — the correct answer is exam-driven referral or surgical exploration.

Pattern 1 — The 6-month referral trigger:

Pattern 2 — The retractile testis:

Pattern 3 — Bilateral non-palpable testes:

Pattern 4 — The salt-wasting trap:

Pattern 5 — The post-pubertal cryptorchidism:

Pattern 6 — The ascending testis:

Pattern 7 — The torsion in cryptorchidism:

Pattern 8 — Post-orchiopexy counseling:

One-Line Recap

Cryptorchidism = surgical disease: refer at 6 months corrected age, perform orchiopexy by 18 months, counsel lifelong about cancer surveillance and fertility — and never forget that bilateral non-palpable testes in a newborn is a disorder-of-sex-development emergency until proven otherwise.

— Birth to 6 months corrected age = observation window

— 6 months = urology referral trigger

— 6–18 months = optimal orchiopexy window

— Never image first; refer first

— Preserve fertility (germ cell maturation begins year 1)

— Reduce and enable surveillance for testicular germ cell cancer (2–8× lifetime risk; orchiopexy reduces but does not eliminate; seminoma most common histology)

— Retractile (can be brought down, stays down → observe)

— Ascending (was down, now up → orchiopexy)

— True undescended (never down → orchiopexy)

— Bilateral non-palpable testes + ambiguous genitalia in newborn → CAH/DSD workup (karyotype, 17-OHP, electrolytes, AMH) before sex assignment confirmation

— Acute inguinal pain + empty hemiscrotum → torsion of undescended testis → immediate OR

— Monthly testicular self-exam from puberty onward

— Realistic fertility counseling (unilateral ≈ normal, bilateral ≈ reduced)

— Document transition of care so the surgical history travels with the patient into adulthood

Board pearl: In any Step 3 vignette mentioning a non-palpable testis past 6 months, choose urology referral over imaging; in any vignette with bilateral non-palpable testes in a newborn, choose endocrine/genetic workup over the operating room.

The clinical clock:

The two reasons to operate:

The three categories you must distinguish on exam:

The can't-miss emergencies:

The lifelong message: