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KembaraXtra-Emergency And Acute Medicine: Hydrocele
Basics
Description Hydrocele is the most common cause of painless scrotal swelling and is classified as congenital or acquired. Congenital hydrocele results from a patent processus vaginalis with communication between the tunica vaginalis and peritoneal cavity; most close spontaneously by 2 years of age. Acquired (secondary) hydrocele occurs due to intrascrotal infection, neoplasm, inguinal or scrotal surgery, or regional or systemic disease. Communicating hydrocele involves a patent processus vaginalis, with scrotal size fluctuating based on position and intra-abdominal pressure. Noncommunicating hydrocele results from excess serous fluid production or impaired absorption within the scrotum.
Etiology Hydrocele results from an imbalance between fluid production and resorption between the tunica vaginalis and tunica albuginea. Causes of adult noncommunicating hydrocele include epididymitis, trauma, mumps, tuberculosis, hypoalbuminemia, and spermatic vein ligation. In the developing world, filarial infections such as Wuchereria bancrofti or Loa loa are the most common causes worldwide. Rare causes include testicular malignancy or lymphoma and abdominoscrotal hydrocele, which may compress adjacent structures causing hydroureter or unilateral limb edema; ultrasound shows a single sac extending through the deep inguinal ring.
Pediatric considerations Congenital hydrocele occurs in approximately 6% of newborn boys and is commonly diagnosed in the newborn period. It is caused by a patent processus vaginalis, which remains open in most newborns. Size may vary with position or crying, and the mass may intermittently resolve. Most close spontaneously by age 2 years.
Diagnosis
Signs and symptoms Painless scrotal swelling with a sensation of heaviness, pulling, or dragging.
History Focus on onset, progression, variability in size, and exclusion of testicular torsion.
Physical exam The mass may feel soft and doughy or firm depending on fluid volume. Transillumination may show homogeneous light transmission but is increasingly replaced by bedside ultrasound.
Essential workup Bedside ultrasound is the diagnostic test of choice, allowing visualization of the hydrocele and testicle and helping identify underlying masses. In adults, the entire testicle must be palpated because hydrocele may obscure a primary neoplasm.
Diagnosis tests and interpretation
Laboratory No routine laboratory testing is required unless evaluating an underlying cause (e.g., urinalysis, AFP, β-hCG).
Imaging Ultrasound demonstrates a large anechoic fluid-filled collection surrounding the anterolateral aspect of the testicle.
Differential diagnosis Epididymitis, indirect inguinal hernia, orchitis, testicular neoplasm, testicular torsion, varicocele.
Treatment
Initial stabilization/therapy Address and stabilize any underlying cause such as trauma or infection.
Emergency department management Perform thorough testicular examination to exclude neoplasm and arrange appropriate referral.
Medication Treat underlying pathology if identified.
Follow-up and disposition
Admission criteria Secondary hydrocele with concern for underlying pathology such as trauma or malignancy.
Discharge criteria Otherwise healthy patients may be discharged with urology referral. Hydrocele repair is elective and performed for discomfort or cosmetic reasons. Options include surgical hydrocelectomy or aspiration with sclerotherapy.
Pediatric considerations Most infant hydroceles resolve spontaneously by 12 months; observation and referral are appropriate. Persistent hydroceles after 12–18 months should be referred for surgical repair due to associated inguinal hernia risk.
Follow-up recommendations Urology follow-up is recommended.
Key points Hydroceles may not transilluminate if the tunica vaginalis is thickened. Bedside ultrasound should always confirm both the fluid collection and normal testicular anatomy to avoid missing serious pathology.
Basics
Description Hydrocele is the most common cause of painless scrotal swelling and is classified as congenital or acquired. Congenital hydrocele results from a patent processus vaginalis with communication between the tunica vaginalis and peritoneal cavity; most close spontaneously by 2 years of age. Acquired (secondary) hydrocele occurs due to intrascrotal infection, neoplasm, inguinal or scrotal surgery, or regional or systemic disease. Communicating hydrocele involves a patent processus vaginalis, with scrotal size fluctuating based on position and intra-abdominal pressure. Noncommunicating hydrocele results from excess serous fluid production or impaired absorption within the scrotum.
Etiology Hydrocele results from an imbalance between fluid production and resorption between the tunica vaginalis and tunica albuginea. Causes of adult noncommunicating hydrocele include epididymitis, trauma, mumps, tuberculosis, hypoalbuminemia, and spermatic vein ligation. In the developing world, filarial infections such as Wuchereria bancrofti or Loa loa are the most common causes worldwide. Rare causes include testicular malignancy or lymphoma and abdominoscrotal hydrocele, which may compress adjacent structures causing hydroureter or unilateral limb edema; ultrasound shows a single sac extending through the deep inguinal ring.
Pediatric considerations Congenital hydrocele occurs in approximately 6% of newborn boys and is commonly diagnosed in the newborn period. It is caused by a patent processus vaginalis, which remains open in most newborns. Size may vary with position or crying, and the mass may intermittently resolve. Most close spontaneously by age 2 years.
Diagnosis
Signs and symptoms Painless scrotal swelling with a sensation of heaviness, pulling, or dragging.
History Focus on onset, progression, variability in size, and exclusion of testicular torsion.
Physical exam The mass may feel soft and doughy or firm depending on fluid volume. Transillumination may show homogeneous light transmission but is increasingly replaced by bedside ultrasound.
Essential workup Bedside ultrasound is the diagnostic test of choice, allowing visualization of the hydrocele and testicle and helping identify underlying masses. In adults, the entire testicle must be palpated because hydrocele may obscure a primary neoplasm.
Diagnosis tests and interpretation
Laboratory No routine laboratory testing is required unless evaluating an underlying cause (e.g., urinalysis, AFP, β-hCG).
Imaging Ultrasound demonstrates a large anechoic fluid-filled collection surrounding the anterolateral aspect of the testicle.
Differential diagnosis Epididymitis, indirect inguinal hernia, orchitis, testicular neoplasm, testicular torsion, varicocele.
Treatment
Initial stabilization/therapy Address and stabilize any underlying cause such as trauma or infection.
Emergency department management Perform thorough testicular examination to exclude neoplasm and arrange appropriate referral.
Medication Treat underlying pathology if identified.
Follow-up and disposition
Admission criteria Secondary hydrocele with concern for underlying pathology such as trauma or malignancy.
Discharge criteria Otherwise healthy patients may be discharged with urology referral. Hydrocele repair is elective and performed for discomfort or cosmetic reasons. Options include surgical hydrocelectomy or aspiration with sclerotherapy.
Pediatric considerations Most infant hydroceles resolve spontaneously by 12 months; observation and referral are appropriate. Persistent hydroceles after 12–18 months should be referred for surgical repair due to associated inguinal hernia risk.
Follow-up recommendations Urology follow-up is recommended.
Key points Hydroceles may not transilluminate if the tunica vaginalis is thickened. Bedside ultrasound should always confirm both the fluid collection and normal testicular anatomy to avoid missing serious pathology.
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