title: Tumoral calcinosis.
abstract: A patient with tumoral calcinosis involving the buttock and ischial bone is presented. Bone marrow involvement and a pattern of septal enhancement on MR imaging after intravenous administration of Gd-DTPA were very suggestive of a diagnosis of a chondro(sarco) matous musculoskeletal tumor. The absence of an underlying metabolic disorder, the appreciation of fluid-calcium levels within the lesion and knowledge of the macroscopic and microscopic appearance of this disorder have led to the correct diagnosis in this case.
authors.affiliation: Department of Diagnostic Radiology, University Hospital Leiden, The Netherlands.
authors.forename: M J
authors.initials: MJ
authors.lastname: Geirnaerdt
authors.forename: H M
authors.initials: HM
authors.lastname: Kroon
authors.forename: R O
authors.initials: RO
authors.lastname: van der Heul
authors.forename: H F
authors.initials: HF
authors.lastname: Herfkens
mesh_terms: D001847:Bone Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging; D002081:Buttocks; D002114:Calcinosis / Q000175:diagnosis* / Q000000981:diagnostic imaging; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007512:Ischium / Q000000981:diagnostic imaging / Q000473:pathology; D008875:Middle Aged; D009135:Muscular Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed