The diagnosis and the treatment of twisted ovarian tumors are still challenging, especially in adolescent girls. We describe an adolescent girl with a twisted ovarian cyst, in whom emergent laparoscopic surgery was successful. She visited us due to severe abdominal pain. Ultrasound revealed a large cystic mass, indicative of an ovarian cyst. Laparoscopy revealed a large left ovarian cyst twisted on its axis. We punctured the cyst and detorsed it. The lessons learned here are: sudden-onset abdominal pain of adolescent associated with nausea and vomiting is strongly suggestive of a ovarian cyst torsion; ultrasound should be performed immediately, if ovarian cyst torsion is suspected, timely intervention with diagnostic laparoscopy is indicated, a minimally invasive surgical approach is recommended to preserve the adnexal structures and ovarian function.