This document describes a case report of a congenital vaginal hydrocele in a 4-year old boy. A hydrocele is a collection of fluid within the tunica vaginalis that often presents as an enlarged scrotum in infants. This boy had swelling of the right scrotum since birth. Examination confirmed a right-sided hydrocele. Ultrasound also showed fluid in the right scrotum. The hydrocele was diagnosed as congenital and communicating. It was surgically corrected through a hydrocelectomy procedure to drain the fluid and evert and stitch the tunica vaginalis. Complications can include infection, blood clots, or recurrence of the hydrocele. Most hydroce