An Infected Urachal Cyst Mimicking a Lower Urinary Tract Infection in a Young Adult

Urachus is an embryologic remnant of allantois, which in adults presents as medial umbilical ligament connecting the dome of the bladder to the umbilicus. Defective obliteration of the urachus results in various urachal abnormalities. An infected urachal cyst is one of the urachal abnormalities, all of which are rare in adult life. The clinical presentation of an infected urachal cyst in adults is heterogeneous, and therefore, the diagnosis may be occasionally challenging. We present and discuss a case of a 25-year-old man with an infected urachal cyst, mimicking a lower urinary tract infection.