[A painful swelling in the groin].

A 38-year-old man presented with a painful swelling in the left groin radiating to the scrotum for three days. Suspecting an incarcerated inguinal hernia, an exploration was performed in the operating room, which revealed vasitis (inflammation of the vas deferens) instead. A urine culture (including an STI test) was obtained, and an empirical 14-day course of ciprofloxacin was initiated.