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Rarely sarcomas develop in previous benign lesions, after a long term disease free interval. We report the experience on these rare cases observed at a single Institution.12 cases curetted and grafted, without radiotherapy developed sarcomas, between 1970 and 2005, 6.5–28 years from curettage (median 18, average 19).Age ranged from 13 to 55 years (median 30, average 32) at first diagnosis; tumors...
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