title: Recurrent and aggressive chondroblastoma of the pelvis with late malignant neoplastic changes.
abstract: A case of chondroblastoma involving the left ischium, lower wing of left ilium and inferior ramus of left pubis is presented. The tumor showed aggressive features and repeated recurrences over a 30-year period and ultimately developed the cytologic features of a malignant neoplasm. However, no metastases have developed.
mesh_terms: D002804:Chondroblastoma / Q000000981:diagnostic imaging / Q000473:pathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local; D010386:Pelvic Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology*; D011859:Radiography