Microperforate hymen at 27 years of age diagnosed with withdrawal bleedingand hysterofiberscopy

Microperforate hymen is a congenital obstructive vaginal membrane with a ti ny opening. It is usually detected long before menarche because of recurrin g vulvovaginitis and urinary tract infection. We report a case of microperf orate hymen in a 27-year-old women presenting oligomenorrhea, in whom the l ocation of the tiny opening on the hymenal membrane was detected by withdra wal bleeding without anesthesia, and definitively diagnosed preoperatively by using hysterofiberscopy.