title: Calcifying solitary bone cyst: morphological aspects and differential diagnosis of sclerotic bone tumours.
abstract: Fourteen solitary bone cysts (SBC) with large areas of calcification (7 in the femur, 4 in the humerus, and 1 each in the pelvis, the tibia and the scapula) and 402 SBC from the Hamburg Bone Tumour Registry were reviewed in a retrospective study. The analysis was done with emphasis on the clinical, radiological and histological appearances. SBC are well known lesions, but calcifying SBC (CSBC) or extensive extragnathic cement-like bone productions are rare. The clinical and radiological differential diagnosis includes fibrous dysplasia, chondroma, low-grade chondrosarcoma and osteosarcoma. Bits of this cement-like matrix are detectable within the wall of approximately 70% (278 of 402) of SBC from the registry. CSBC are changed SBC. The intraoperative confirmation of the diagnosis on a frozen section by the bone pathologist leads to curettage which is currently the most common therapy in this benign lesion.
authors.affiliation: Department of Bone Pathology, University Hospital of Hamburg, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Amling
authors.forename: M
authors.initials: M
authors.lastname: Werner
authors.forename: M
authors.initials: M
authors.lastname: Pösl
authors.forename: R
authors.initials: R
authors.lastname: Maas
authors.forename: U
authors.initials: U
authors.lastname: Korn
authors.forename: G
authors.initials: G
authors.lastname: Delling
mesh_terms: D000293:Adolescent; D000328:Adult; D001845:Bone Cysts / Q000175:diagnosis* / Q000473:pathology*; D001859:Bone Neoplasms / Q000175:diagnosis* / Q000473:pathology; D002114:Calcinosis / Q000175:diagnosis* / Q000473:pathology*; D002485:Cementoma / Q000473:pathology; D002648:Child; D002675:Child, Preschool; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D012598:Sclerosis / Q000175:diagnosis