J Korean Med Sci.  1999 Oct;14(5):586-588. 10.3346/jkms.1999.14.5.586.

Parosteal osteosarcoma of the scapula

• Park YK
• Ryu KN

• KMID: 646031
• DOI: http://doi.org/10.3346/jkms.1999.14.5.586

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.

Keyword

Osteosarcoma; Scapula

MeSH Terms

Adult
Bone Neoplasms/radiography*
Bone Neoplasms/pathology
Case Report
Human
Male
Osteosarcoma/radiography*
Osteosarcoma/pathology
Scapula/radiography*
Scapula/pathology
Tomography, X-Ray Computed