title: Bursa formation in secondary chondrosarcoma with intrabursal chondrosarcomatosis.
abstract: Osteocartilaginous exostoses (osteochondromata) are rather common bone tumors. Although most are straightforward lesions, one may occasionally encounter one of a number of well-recognized complications. In the current case, secondary malignant transformation and bursal sac formation were present. Additionally, numerous malignant chondroid nodules were shed into the attached bursa, giving rise to a large soft tissue mass, a situation which we feel is both remarkable and, to our knowledge, unique.
mesh_terms: D000368:Aged; D002061:Bursa, Synovial / Q000000981:diagnostic imaging / Q000473:pathology*; D002813:Chondrosarcoma / Q000000981:diagnostic imaging / Q000473:pathology*; D005260:Female; D005266:Femoral Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology*; D006801:Humans; D009378:Neoplasms, Multiple Primary / Q000000981:diagnostic imaging / Q000473:pathology*; D014057:Tomography, X-Ray Computed