This document provides an overview of hydrocele, including its definition, developmental anatomy, risk factors, classification, signs and symptoms, diagnosis, complications, differential diagnosis, management, and a clinical case scenario. A hydrocele is an abnormal collection of fluid between layers of the tunica vaginalis that can be congenital or acquired. It presents as a painless scrotal swelling that is transilluminant and fluctuant. Management involves surgical excision via techniques like Lord's plication or Jaboulay's procedure to prevent recurrence of the fluid collection.