SKELETAL METASTASES FROM SOFT-TISSUE SARCOMASINCIDENCE, PATTERNS, AND RADIOLOGICAL FEATURESH. Yoshikawa, MD, Chief of Musculoskeletal Tumour Surgery; T. Ueda, MD, Musculoskeletal Tumour Surgeon; and S. Mori, MD, Musculoskeletal Tumour SurgeonDepartment of Orthopaedic Surgery, Osaka Medical Centre for Cancer and Cardiovascular Diseases, 1-3-3, Nakamichi, Higashinari-ku, Osaka 537, Japan. N. Araki, MD, Musculoskeletal Tumour Surgeon; S. Kuratsu, MD, Musculoskeletal Tumour Surgeon; A. Uchida, MD, Chief of Musculoskeletal Tumour Surgery; and T. Ochi, MD, Professor of Orthopaedic Surgery Department of Orthopaedic Surgery, Osaka University Medical School, 2-2, Yamadaoka, Suita 565, Japan. Correspondence should be sent to Dr H. Yoshikawa. We reviewed 277 patients with soft-tissue sarcoma (STS) treated between 1975 and 1995 to study the incidence, distribution, time of appearance, and radiological findings of skeletal metastases. Of these, 28 (10.1%) had metastases within a mean period of 18.6 months after admission. The incidence of skeletal metastases differed among the histological subtypes of sarcoma; alveolar soft-part sarcoma, dedifferentiated liposarcoma, angiosarcoma, and rhabdomyosarcoma tended to show higher incidences. The regional bones close to the primary tumour were affected in 13 (46.4%) of the 28 patients, and the axial bones in 18 (64.3%). Radiologically, the metastatic bony lesions predominantly showed osteolytic changes, and there were pathological fractures in 21 of 44 lesions.
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