Bone metastasis versus insufficiency fractures due to pelvic radiotherapy for gynecologic neoplasm
Abstract
Five cases of patients with gynecological neoplasm (four cervix carcinoma and one endometrial sarcoma) who underwent pelvic external radiotherapy and intracavitary brachytherapy in whom pathologic pelvic uptake was found in the bone scan are presented. The diagnosis was pelvic insufficiency fractures due to radiotherapy adverse effects on the skeletal system confirmed by CT and by the favorable scintigraphy and clinical outcome. Both bone metastases and insufficiency fractures must be considered in the differential diagnosis of bone pain in irradiated pelvises. The bone scintigraphy detects these insufficiency fractures early and can show a typical symmetric uptake pattern. In asymmetric lesions, the CT and clinical follow-up as well as the scintigraphic evolution of the lesions should confirm the findings of the bone scintigraphies.
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