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Undescended Testicle (Palpable)

What is Undescended testicle (palpable)?

An undescended testicle (medical term: cryptorchidism) occurs when one or both testes fail to move from the abdomen into the scrotum before birth. When the undescended testis can be felt (palpated) on physical exam, it is called a palpable undescended testicle. The condition is most common in newborn boys, affecting about 3–4 % of full‑term infants and up to 30 % of premature infants ( Mayo Clinic ). If left untreated, it can increase the risk of infertility, testicular torsion, and testicular cancer later in life.

Common Causes

Most cases are idiopathic, but several factors can interfere with the normal descent of the testes:

• Prematurity – Early birth shortens the time needed for testicular descent.
• Hormonal abnormalities – Deficiencies in testosterone, insulin‑like factor 3 (INSL3), or luteinizing hormone (LH) disrupt the hormonal signals that guide descent.
• Genetic syndromes – Conditions such as Klinefelter syndrome (47,XXY), Turner syndrome, and Prader‑Willi syndrome can be associated with cryptorchidism.
• Maternal health issues – Maternal diabetes, smoking, or alcohol use during pregnancy increase risk.
• Mechanical obstruction – Inguinal hernias, hydroceles, or a short spermatic cord may physically block the testis.
• Exposure to endocrine‑disrupting chemicals – Pesticides, phthalates, and certain plastics have been linked to altered fetal hormone balance.
• Congenital infections – TORCH infections (e.g., rubella) can affect genital development.
• Testicular torsion in utero – A twisted cord can impair descent.
• Congenital spinal or muscular abnormalities – Conditions such as spina bifida may affect the anatomy of the inguinal canal.
• Low birth weight – Often accompanies prematurity and shares similar risk pathways.

Associated Symptoms

While many infants have no discomfort, some may show additional findings that prompt a clinical evaluation:

• Empty scrotum on one side (or both).
• A firm, pea‑sized lump in the groin, upper thigh, or abdomen that can be felt (palpable testis).
• Unexplained swelling or tenderness in the inguinal region.
• History of inguinal hernia repair (often co‑existing).
• In older children, reduced testicular volume compared with the opposite side.

When to See a Doctor

Prompt evaluation is essential because the window for optimal treatment is limited. Contact a pediatrician or family doctor if you notice:

• The scrotum feels empty or feels different from the other side.
• You can feel a lump in the groin or abdomen that does not disappear with gentle pressure.
• Any swelling, redness, or pain in the groin area.
• History of prematurity or low birth weight combined with a non‑palpable testis.
• Recurring “bulge” when the child coughs or strains (possible hernia).

Early referral to a pediatric urologist or surgeon usually occurs before the child is 6 months old (corrected age for preemies).

Diagnosis

Diagnosis relies on a combination of physical examination and imaging when needed.

Physical examination

• Gentle inspection and palpation of the scrotum, groin, and lower abdomen with the child lying supine.
• Assessment of testicular size, firmness, and position.
• Evaluation for associated conditions such as inguinal hernia or hydrocele.

Imaging studies (used selectively)

• Ultrasound – Helpful for locating a non‑palpable testis in the abdomen; limited for palpable testes.
• Magnetic resonance imaging (MRI) – Reserved for complex cases where the testis is high in the abdomen or when an intra‑abdominal mass is suspected.
• Laparoscopy – Both a diagnostic and therapeutic tool; allows direct visualization of the internal inguinal ring and can guide surgical decision‑making.

Hormonal evaluation

In select cases, especially when bilateral cryptorchidism is present, doctors may order serum levels of testosterone, LH, FSH, and inhibin‑B to assess testicular function.

Treatment Options

Because the testis needs to be in the scrotum for normal temperature regulation and future fertility, treatment is aimed at repositioning it (orchiopexy) or, rarely, observing for spontaneous descent.

Observation

• Up to 70 % of full‑term infants with a palpable undescended testis will descend spontaneously by 6 months of age.
• Close follow‑up every 4–6 weeks until 12 months is recommended if the testis is still palpable but not yet in the scrotum.

Surgical repair – Orchiopexy

• Standard of care for testes that have not descended by 6–12 months (corrected age).
• Procedure performed under general anesthesia; the surgeon mobilizes the testis and secures it within the scrotum.
• Minimally invasive (single‑incision or laparoscopic) techniques are common for high‑lying testes.
• Success rates exceed 95 % with low complication rates.

Hormonal therapy

• Human chorionic gonadotropin (hCG) or gonadotropin‑releasing hormone (GnRH) injections have been studied.
• Results are inconsistent; hormonal therapy may be considered when surgery is contraindicated or as an adjunct before orchiopexy.
• Potential side effects include premature puberty or irritability.

Post‑operative care

• Analgesia (acetaminophen or ibuprofen) for pain control.
• Scrotal support and avoidance of strenuous activity for 1–2 weeks.
• Follow‑up ultrasound at 6 months to confirm testicular position and size.

Prevention Tips

While many risk factors are not controllable, certain measures may reduce the likelihood of cryptorchidism:

• Attend regular prenatal care; manage maternal diabetes, hypertension, and abstain from smoking/alcohol.
• Reduce exposure to endocrine‑disrupting chemicals—choose BPA‑free bottles and avoid pesticides when possible.
• Maintain a healthy weight and avoid extreme heat exposure (e.g., hot tubs) during pregnancy.
• For premature infants, diligent neonatal follow‑up ensures early detection and timely referral.
• Educate caregivers on normal newborn genital examination so abnormalities are spotted early.

Emergency Warning Signs

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Sources: Mayo Clinic. Undescended Testicle. https://www.mayoclinic.org; American Academy of Pediatrics (AAP) Clinical Report on Cryptorchidism, 2020; National Institute of Child Health & Human Development (NICHD); Cleveland Clinic. Cryptorchidism (Undescended Testicle). World Health Organization (WHO) – Guidelines on endocrine‑disrupting chemicals.

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