Congenital Megaureter Presenting in an Adult as a Vaginal Wall Cyst

Vaginal cysts are a common finding. The differential diagnosis includes epidermal inclusion, Bartholin gland, Gartner duct, and Skene gland cysts and Müllerian anomalies. Rarely, leiomyomas, cancers, or ectopic ureters or megaureters are found.

A 31-year-old woman, gravida 3 para 3, presented with a 12-year history of intermittent abdominal pain and involuntary loss of urine. She was diagnosed with ectopic vaginal megaureter after evaluation and subsequently underwent a nephroureterectomy with a marsupialized distal ureter. She remains asymptomatic.

Consideration of a rare diagnosis such as an ectopic ureter is important when patients repeatedly present with involuntary urinary incontinence in conjunction with a vaginal cyst and an otherwise negative evaluation. Using magnetic resonance imaging can be useful to assess urinary tract involvement, particularly in patients with known urinary tract malformations.