title: Extraskeletal osteosarcoma with a highly malignant course. A case report.
abstract: A case of a highly malignant extraskeletal osteosarcoma is reported. Although biopsy is not considered necessary in cases of heterotopic calcification when the aetiology is known, malignancy should be suspected when the cause is questionable.
authors.affiliation: Orthopädische Universitätsklinik, Heidelberg, Germany.
authors.forename: H G
authors.initials: HG
authors.lastname: Simank
authors.forename: H
authors.initials: H
authors.lastname: Welkerling
authors.forename: L
authors.initials: L
authors.lastname: Bernd
authors.forename: V
authors.initials: V
authors.lastname: Ewerbeck
mesh_terms: D000368:Aged; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D001943:Breast Neoplasms / Q000532:radiotherapy / Q000628:therapy; D003937:Diagnosis, Differential; D017809:Fatal Outcome; D005260:Female; D006801:Humans; D019042:Muscle Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000188:drug therapy; D009333:Neck; D016609:Neoplasms, Second Primary / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000188:drug therapy; D012516:Osteosarcoma / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000188:drug therapy; D011877:Radionuclide Imaging; D012782:Shoulder