Hydrocele
Hydrocele is a painless accumulation of serous fluid within the tunica vaginalis, congenital and communicating in infants or acquired and noncommunicating in adults, diagnosed by transillumination and confirmed with scrotal ultrasound; treatment is observation for asymptomatic disease and hydrocelectomy for persistent or symptomatic cases.
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What this article covers
- Overview
Definition: hydrocele is an abnormal accumulation of serous fluid within the tunica vaginalis, the serous sac around the testis, producing a painless, fluid-filled scrotal swelling.
- Epidemiology
Congenital hydrocele is the most common cause of infant scrotal swelling, resulting from incomplete obliteration of the processus vaginalis, the same embryologic remnant that forms the tunica vaginalis.
- Risk factors
Patency of the processus vaginalis (congenital type): failure of the processus to obliterate after testicular descent is the direct anatomic risk factor for communicating hydrocele in infants and young boys.
- Pathophysiology
Communicating (congenital) hydrocele: the processus vaginalis, a peritoneal outpouching that guides testicular descent and normally closes after birth, remains patent; peritoneal fluid tracks down…
- Clinical features
Painless scrotal swelling is the hallmark: patients present with a gradually enlarging, nontender scrotal mass; acute pain is atypical for simple hydrocele and should prompt evaluation for a painful…
- Differential diagnosis
Testicular torsion: acute, severe unilateral pain, high-riding testis, absent cremasteric reflex; a surgical emergency that does not transilluminate and requires immediate exclusion in any acute scrotal presentation.
- Diagnosis
Hydrocele is a clinical diagnosis confirmed by transillumination: a painless, fluctuant scrotal swelling that transmits light on transillumination, with a palpable testis distinct from the fluid…
- Management
First, in a congenital (infant) communicating hydrocele, observe: most resolve spontaneously as the processus vaginalis completes obliteration; continue observation through 12 to 24 months of age before considering intervention.
- Complications
Missed testicular torsion or tumor: the principal risk of a hydrocele evaluation is anchoring on the benign diagnosis and failing to exclude a coexisting torsion (time-critical) or malignancy hidden by the fluid.
- Prognosis
Excellent overall: hydrocele is benign with no effect on fertility or long-term testicular function when it is a simple fluid collection rather than a marker of an underlying tumor or torsion.
- Prevention
No population screening program exists for hydrocele, as it is a benign, usually self-limited or easily correctable anatomic finding rather than a disease with a preventable systemic cause.
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