Two adolescent cases of Fitz-Hugh-Curtis syndrome, which has not been previously reported in Korean girls, presenting with right upper-quadrant abdominal pain, nausea, vomiting, and fever are reported here. A careful and thorough inquiry into the sexual history of the first patient, which was not done upon admission, led to a careful reassessment of the dynamic abdominal computed tomography scan revealing hepatic capsular enhancement without evidence of gallbladder or liver disease. Both cases were diagnosed noninvasively and were treated successfully by medical intervention. A high index of suspicion of Fitz-Hugh-Curtis syndrome should be implemented in the differential diagnosis of right upper quadrant pain, particularly in sexually active girls, for a prompt diagnosis and rapid cure.