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Between 1992 and 2008, we treated 35 patients with giant cell tumor (GCT) of bone, seven of the 35 pre-sented with a pathological fracture. The fractures were located in the femur in five, and in the humerus and radius in one patient each. The surgical treatments were curettage in six cases and wide resection in the distal radius case. Two of the seven patients developed local recurrence, giving a local recurrence rate of 29%. The local recurrence rate in GCT patients without a pathological fracture was 21%. There was a tendency for there to be a higher recurrence rate associated with fractured GCT, but no statistically significant difference was observed between the two groups. Therefore, it was considered that a pathological fracture was not a risk factor for local recurrence in GCT

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Primary liposarcoma of bone is exceedingly rare. We report a case of primary pleomorphic liposarcoma in the humerus of a 38-year-old female. Radiographs demonstrated an expansile and osteolytic lesion extending from the head to the proximal part of the shaft in the right humerus. MR study showed a defined lesion in the humerus. The lesion had an iso-signal intensity and partial high-intensity lesion on T1-weighted images and a heterogeneous high signal intensity on T2-weighted images. Wide resection and proximal humeral endoprosthesis replacement were performed. Final pathological diagnosis of the lesion was pleomorphic liposarcoma. This is the second reported case of pleomorphic liposarcoma of the bone, and the first case presenting MRI findings for liposarcoma of bone.

Between 1998 and 2007, we treated 157 patients with malignant soft tissue tumors. Patients with obvious lymph node metastasis, metastasis from bone or soft tissue sarcoma, and with obvious advanced stage disease which had multiple metastases were excluded from the present analysis. Finally, sixteen of the 157 patients were diagnosed to have soft tissue metastasis from carcinomas or hematopoietic malignancies. There were 10 males and 6 females with an average age of 65 (range, 50 - 83) years. Four lesions were located in the abdomen and back, 3 in the thigh, 2 in the chest, and 1 lesion each in the upper arm, lower leg and buttock. There were 9 intramuscular and 7 subcutaneous metastases. The average tumor size was 6 cm (range 2 - 17 cm). The initial diagnoses were a primary soft tissue tumor in 8 cases, primary soft tissue tumor or metastatic soft tissue tumor in 6, and inflammatory lesions in 2. Four of the 6 cases were suspected to be a metastatic soft tissue tumor in the initial diagnosis based on a past history of malignancy. There were no characteristic findings of metastatic soft tissue tumors in the imaging studies. The primary origins were lung cancer in 6 cases, malignant lymphoma in 5, gastric cancer in 2, and esophageal cancer, pancreatic cancer and uterine cancer in 1 patient each. Treatments were administered to all cases, including radiotherapy and chemotherapy in 11, chemotherapy in 2, wide resection and chemotherapy in 1, radiotherapy in 1 and palliative therapy in 1. The final oncological status was continuous disease free survival in 1 patient, no evidence of disease in 1, alive with disease in 7, and dead of disease in 7 patients. The estimated one-year survival was 47% and the two-year survival was 0%