ABSTRACT
CASE REPORT: A 15-year-old virgin Caucasian female presented to the emergency room with a 40-hour history of acute left lower quadrant abdominal pain and nausea. Evaluation suggested a left pelvic kidney with obstructed ureter being the etiology. Her pain continued to escalate so further workup with laparoscopy was performed. This demonstrated a left pelvic sidewall hemi uterus with ruptured hematosalpinx. This is an unusual clinical presentation of a müllerian anomaly not previously documented. DISCUSSION: The differential diagnosis of acute unilateral abdominal pain in adolescent females should include müllerian anomalies. The incidence of this diagnosis is low but the evaluation and treatment can be performed in an expeditious manner if the diagnosis is considered. The laparoscopic excision of a unilateral noncommunicating uterine horn is a valid and recommended treatment approach of this rare malformation.