Gynaecological Perspective of Schwannoma: A Rare Pelvic Tumour

Schwannomas are benign tumours that arise from Schwann cells of nerve fibres. They commonly occur in the head, neck, mediastinum and extremities but pelvic occurrence is rare. We report a rare case of retroperitoneal tumour with Gynaec presentation. A 26-year-old parous woman was admitted with abdominal mass, pain abdomen, painful menstruation and painful coitus for one year. Abdominal examination revealed firm mass filling the lower abdomen with restricted mobility. On bimanual examination cervix was hitched against pubic symphysis. Mass felt through anterior and left adnexa not tender, uterus felt close to the mass about 8-10 weeks size, right adnexa free. USG revealed broad ligament fibroid with cystic right ovary. Hence myomectomy was planned, but intraoperatively it was found that the mass was filling the pelvis close to bulky uterus with cystic right ovary. After informed consent while proceeding with hysterectomy, necrotic, yellow colour material came out from the capsule like structure of the mass which was close to lower part of posterior wall of uterus. Mass was removed except which was adherent to deeper structure left behind. Histopathological examination revealed Schwannoma undergoing cystic degeneration. Since Schwannoma was mostly diagnosed incidentally, high degree suspicion is necessary for diagnosis.