The exhibit displays ill defined large destructive tumour over proximal part of the tibia involving the epiphysis and metaphysis. The tumour is infiltrative, destroying the overlying cortex and extending into the surrounding soft tissue. It exhibit heterogenous tan to brown mass.

Osteosarcoma shows malignant osteoid deposited in a lace like pattern or as delicate trabeculae. The malignant cells are pleomorphic with irregular hyperchromatic nuclei and high mitotic activity.

Osteosarcoma

The type(s) of osteosarcoma include(s):

A. Osteoblastic [T/F]

B. Chondroblastic [T/F]

C. Fibroblastic [T/F]

D. Telangiectatic [T/F]

E. Lymphoblastic [T/F]

Answers: T T T T F