| chondrosarcoma | <oncology, tumour> A malignant neoplasm derived from cartilage tissue (chondroblasts). (27 Sep 1997) |
|---|---|
| chondrosarcoma, mesenchymal | A rare aggressive variant of chondrosarcoma, characterised by a biphasic histologic pattern of small compact cells intermixed with islands of cartilaginous matrix. Mesenchymal chondrosarcomas have a predilection for flat bones; long tubular bones are rarely affected. They tend to occur in the younger age group and are highly metastatic. (devita jr et al., cancer: principles & practice of oncology, 3d ed, p1456) (12 Dec 1998) |
| periosteal | <anatomy> Situated around bone; of or pertaining to the periosteum. Source: Websters Dictionary (01 Mar 1998) |
| periosteal bone | In the development of a long bone a collar or cuff of osseous tissue forms in the perichondrium of the cartilage model; the connective tissue membrane of this perichondral bone then becomes periosteum. Synonym: periosteal bone. (05 Mar 2000) |
| periosteal bud | A vascular connective tissue bud from the perichondrium that invades the ossification centre of the cartilaginous model of a developing long bone. (05 Mar 2000) |
| periosteal chondroma | <tumour> A chondroma that develops from periosteum or periosteal connective tissue. Synonym: juxtacortical chondroma. (05 Mar 2000) |
| periosteal elevator | An instrument used for separating the periosteum from the bone. Synonym: rugine. (05 Mar 2000) |
| periosteal ganglion | A flattened subperiosteal cavity containing clear, yellow, viscous, synovial-like fluid. (05 Mar 2000) |
| periosteal graft | A graft of periosteum, usually placed on bare bone. (05 Mar 2000) |
| periosteal implantation | Insertion of a normal tendon into a periosteum as part of a tendon transplantation operation. (05 Mar 2000) |
| periosteal layer of dura mater | See: dura mater of brain. (05 Mar 2000) |
| periosteal osteosarcoma | <tumour> Chondroblastic osteosarcoma occurring on the surface of bones without involvement of the marrow; usually presents in adolescents and young adults as a lucent defect with bone spicules extending into soft tissues. Histologically, the tumour is intermediate to high grade, and the cartilage is lobulated. (05 Mar 2000) |
| periosteal reaction | <radiology> In adults: hypertrophic osteoarthropathy (HOA), pachydermoperiostosis, vascular insufficiency, thyroid acropachy, fluorosis in kids: physiologic periostosis, Caffey disease, JRA, acute leukaemia, scurvy, rickets, congenital syphilis, hypervitaminosis A (12 Dec 1998) |
| periosteal reaction patterns | <radiology> Pattern most indicative of buttressing eosinophilic granuloma laminated Ewing sarcoma or hair-on-end Codman triangle osteo- or chondrosarcoma or sunburst (per Resnick) (12 Dec 1998) |
| periosteal reflex | A muscular contraction in the arm following a tap on the radius or ulna. (05 Mar 2000) |