Parosteal osteosarcoma of the scapula.
10.3346/jkms.1999.14.5.586
- Author:
Yong Koo PARK
1
;
Kyung Nam RYU
Author Information
1. Department of Pathology, College of Medicine, Kyung Hee University, Seoul, Korea. damia@chollian.net
- Publication Type:Case Reports
- Keywords:
Osteosarcoma;
Scapula
- MeSH:
Adult;
Bone Neoplasms/radiography*;
Bone Neoplasms/pathology;
Case Report;
Human;
Male;
Osteosarcoma/radiography*;
Osteosarcoma/pathology;
Scapula/radiography*;
Scapula/pathology;
Tomography, X-Ray Computed
- From:Journal of Korean Medical Science
1999;14(5):586-588
- CountryRepublic of Korea
- Language:English
-
Abstract:
Parosteal osteosarcoma is a low-grade osteosarcoma, which occurs on the surface of the bone. We had experienced a parosteal osteosarcoma involving the flat bone, the scapula of a 21-year-old man. This is an extremely rare location for a parosteal osteosarcoma. Plain radiograph showed broad-based, well-defined radiodense lesion at the scapula. Computed tomogram demonstrated an intact cortex and absence of a medullary involvement. Tumor showed a lobulated, high-density lesion, indicating bone formation. Histologically, parosteal osteosarcoma is a well-differentiated osteosarcoma. The tumor is composed of a hypocellular proliferation of spindle cells, with minimal cytologic atypia. The bone is in the form of a well-formed bony trabeculae. Occasional cartilage is present in the form of a cap.
