2017 Volume 53 Issue 4 Pages 949-953
We report the case of 12-year-old premenarcheal girl. A year ago, she was diagnosed as having left ovarian non-neoplastic torsion, and an emergency operation was performed to release the torsion and fix it. Within the follow-up period, a cystic lesion in the affected ovary increased in size, accompanied by abdominal pain. Abdominal ultrasonography and Magnetic resonance imaging revealed a simple cyst, but it rapidly increased in size to 17 cm 1 year after the operation. During the follow-up period, tumor markers (AFP, HCG-β, and CA125) were within normal range. Surgery was performed to remove the cystic lesion. We considerded the lesion as cystic teratoma, serous/mucinous cystadenoma or ovarian simple cyst preoperatively diagnose. By umbilical Ω incision, we aspirated the cystic contents. The contents were yellow transparent mucus. After depressurization, we pulled up the left ovary from the incision and found no evidence of torsion. We confirmed no solid components in the lesion and performed cystectomy. On the basis of histopathological examination findings, she was diagnosed as having ovarian endometriosis. It is very rare for endometriosis to develop before menstruation. Long-term observation is necessary to determine the possibility of infertility associated with adhesion in the pelvis and pain after menstruation onset.
