OBJECTIVE: To review clinical and radiographic findings in patients with histologically confirmed giant cell tumor of bone. MATERIALS AND METHODS: Clinical and radiological data of 115 patients with giant cell tumor of bone were analyzed. RESULTS: Of the evaluated cases, 57.4% (66) were female and 80% (92) were white. The patients were 30 years old in average and the most common site of the lesions was the distal femoral metaphysis, in 22.6% (26). The most common radiographic aspect was a purely lytic lesion, in 63.7% (51) of the cases. CONCLUSION: Giant cell tumor of bone is not an uncommon tumor, predominant in the white race, with radiological findings well established.

Keywords: Conventional radiology, Giant cell tumor of bone, Bone neoplasms

OBJECTIVE: To review the clinical and radiographic findings in patients with histologically confirmed Ewing's sarcoma. MATERIALS AND METHODS: Clinical and radiological (whenever available) data of 226 patients with Ewing's sarcoma of the bone were analyzed. RESULTS: Of the evaluated cases, 61.5% (139) were male and 83.7% (189) were white. The average age was 14 years old and the most common site of the lesions was the iliac bone, seen in 13.7% (31) of the cases. The most common radiological findings were lytic lesion with periosteal reaction, seen in 32.7% (74) of the patients. CONCLUSION: Ewing's sarcoma of bone is an aggressive neoplasm, occurring mainly in the second decade of life, which main radiological findings are lytic lesions with periosteal reaction, typical characteristic of aggressive lesions.

Keywords: Conventional radiology, Ewing's sarcoma, Bone neoplasms