title: [Is the rings and arcs pattern of mineralization specific for chondroid matrix tumors?].
abstract: The rings and arcs pattern of mineralization is considered pathognomonic for cartilaginous tumors. The authors report four cases of osteoblastomas in which the presence of such a pattern of mineralization mistakenly lead to a diagnosis of cartilaginous tumor. These densities are not explained by the histologic findings.
mesh_terms: D000293:Adolescent; D001175:Arthrography; D001706:Biopsy; D001859:Bone Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D002113:Calcification, Physiologic; D002812:Chondroma / Q000175:diagnosis / Q000000981:diagnostic imaging; D002813:Chondrosarcoma / Q000175:diagnosis / Q000000981:diagnostic imaging; D003937:Diagnosis, Differential; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D018215:Osteoblastoma / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed
vernacular_title: Les calcifications annulaires sont-elles spécifiques des matrices tumorales cartilagineuses?