SLIDE SEMINAR -PART II: MALIGNANT BONE TUMORS Case I – Conventional osteosarcoma

Osteosarcoma can be defined as a malignant tumor of bone in which malignant mesenchymal tumor cells have the ability to produce osteoid or immature bone. There may be profuse osteoid matrix production and extensive minealization throughout the tumor, or both may be minimal in extent and very focally distributed. The osteoblastic nature of the tumor can be easy to identify both radiographically and microscopically, or extensive sampling and a great deal of expertise may be required for its recognition.