title: [Cell proliferation in bone tumors. Immunohistologic study of Ki-67 protein expression].
abstract: Bone tumors represent a group of tumors of various dignity. In spite of this single tumor entities may display strong morphological resemblance to each other which can in turn result in profound difficulties in differential diagnosis. The biological behaviour of a tumor is mainly determined by its rate of proliferation. In this study the rate of proliferation of 64 bone tumors (30 high-grade central osteosarcomas, 6 low-grade osteosarcomas, 8 giant cell tumors, 8 aneurysmatic bone cysts, 5 osteoidosteomas/osteoblastomas, 7 fibrous dysplasias and 5 cases of a myositis ossificans) were analysed. Immunohistochemistry was performed on paraffin-embedded tissue sections using the MIB-1 monoclonal antibody. MIB-1 recognizes the proliferation-associated Ki-67 protein which is expressed during the active phases of the cell cycle but cannot be detected in senescent cells. Among high-grade central osteosarcomas a significantly higher rate of proliferation (average value 30%) was found in comparison with low-grade osteosarcomas and other benign intraosseous bone tumors. This approach proved to be very useful in the distinction between high-grade and low-grade osteosarcomas as well as bone-forming intraosseous tumors. However distinguishing low-grade osteosarcomas from benign bone tumors by determining only the rate of proliferation was not possible, although interestingly, the proliferative rate of myositis ossificans, a purely reactive lesion, was in the range of the values determined for high-grade osteosarcoma.
authors.affiliation: Abteilung Osteopathologie, Hamburger Knochentumorregister Pathologisches Institut, Universität Hamburg.
authors.forename: I
authors.initials: I
authors.lastname: Stenzel
authors.forename: M
authors.initials: M
authors.lastname: Pösl
authors.forename: H
authors.initials: H
authors.lastname: Ritzel
authors.forename: M
authors.initials: M
authors.lastname: Hentz
authors.forename: M
authors.initials: M
authors.lastname: Werner
authors.forename: G
authors.initials: G
authors.lastname: Delling
mesh_terms: D014408:Biomarkers, Tumor / Q000032:analysis* / Q000235:genetics; D001845:Bone Cysts / Q000235:genetics / Q000473:pathology; D017824:Bone Cysts, Aneurysmal / Q000235:genetics / Q000473:pathology; D001847:Bone Diseases / Q000235:genetics / Q000473:pathology; D001859:Bone Neoplasms / Q000235:genetics / Q000473:pathology*; D001842:Bone and Bones / Q000473:pathology; D002455:Cell Division / Q000235:genetics / Q000502:physiology*; D007124:Immunoenzyme Techniques; D019394:Ki-67 Antigen; D009363:Neoplasm Proteins / Q000032:analysis* / Q000235:genetics; D009687:Nuclear Proteins / Q000032:analysis* / Q000235:genetics; D012516:Osteosarcoma / Q000235:genetics / Q000473:pathology*; D011379:Prognosis
chemical_list: D014408:Biomarkers, Tumor; D019394:Ki-67 Antigen; D009363:Neoplasm Proteins; D009687:Nuclear Proteins
vernacular_title: Zellproliferation bei Knochentumoren.