A Rare Non Urologic Cause for Urinary Retention; Report of 2 Cases

Although imperforate hymen is a rare condition, it is the most common obstructive anomaly of the female genital tract. the early diagnosis of this condition requires a high index of suspicion in newborns and in females without a history of menarche. hydronephrosis is a known but rare complication of an imperforate hymen. hereby we preset 2 cases of premenstrual adolescent with urinary retention and bilateral moderate to severe hydroureteronephrosis.