An 18-year-old virgin, pubertal girl was treated for abnormal menses and dysmenorrhea. She had no history of trauma, sexual infection, or abuse. Occlusion of the introitus of the vagina had been first diagnosed 10 years earlier. The patient presented with fusion of the labia minora in the midline, posteriorly. Her physical examination, ultrasonographic laboratory examination, and intravenous pyelogram were all normal. Following surgical treatment, she had no problems at the time of postoperative follow-up.