A sixty four years old woman was admitted to our hospital on stretcher. She complained of right thigh pain and swelling. Ten days before admission she had slight pain there. At the day of admission she fell down to floor. Radiological examination revealed fracture of the right femoral diaphysis. Two weeks after open reduction by Kuntscher nail, abnormal radiolucent defect appeared around the fracture site. We suspected pathological fracture. General survey by scintigraphy or other laboratory data did not present other lesions.
Bone biopsy was made and pathological diagnosis was malignant mesenchymal tumor. Because she did not wish to have operation done, she had disarticulation surgery five months later, followed by chemotherapy.
At present she is healthy and has no local recurrent sign and symptom, nor lung metastasis.
