A pubic cartilaginous cyst is a rare condition and is considered a result of degenerative changes in the symphysis pubis, mainly described in elderly multiparous women. There are only a few reported cases in the literature, and patients presented most frequently with a painful vaginal/vulvar mass. This case report is the first to describe a patient with rapidly progressing stress urinary incontinence (SUI) due to a retropubic cartilaginous cyst. The patient in this case underwent surgical intervention; symptoms improved postoperatively, suggesting that surgical intervention in symptomatic patients should be taken into consideration, as it can have beneficial effects. Knowledge of this condition and presenting symptoms is important in order to suggest appropriate management in this rare group of patients.