Incidental Detection of Ovarian Thecoma by 99mTc-MDP Whole-Body Bone Scan Contribution of Hybrid SPECT/CT

Ovarian thecoma is a benign and rare neoplasm that accounts for 0.5% to 1% of all ovarian tumors. A 55-year-old woman with known breast cancer underwent a metastatic workup before surgery. The Tc-99m-MDP whole-body bone scan revealed intense uptake in the left pelvic region. Hybrid SPECT/CT imaging showed that the elevated Tc-99m-MDP activity was in a tumor with calcification in the left adnexa. Dynamic enhanced MRI revealed marked enhancement of the tumor. Resection of the tumor was subsequently performed, and pathologic analysis confirmed the diagnosis of an ovarian thecoma.