Ovarian stone. A case report.

BACKGROUND: To our knowledge, ovarian calcification and ossification involving the whole ovary with images that mimic stone formations have not been reported before. CASE REPORT: A 42-year-old woman presented with severe abdominal pain. Plain abdominal radiography showed a well-defined, calcified mass, 4 x 5 cm, located in the pelvis. Physical examination showed a right adnexal mass accompanied by severe pain and tenderness while lifting. Transvaginal ultrasound showed an ill-defined mass with acoustic comet tail. Computed tomography demonstrated a well-defined mass on the right adnexa, 4 x 5 cm, with an extensively calcified shell. Surgical exploration revealed an enlarged, ovoid, pale brown ovary, which looked exactly like an ovary made of stone. The pathologic findings were compatible with a benign chocolate cyst with extensive calcification and ossification. The pelvic pain resolved completely after the surgery. CONCLUSION: Though the cause of this unique case remains unknown, torsion with subsequent infarction of an ovarian endometrioma was suggested. Complete excision was the treatment of choice.