The cells here tend to be spindle cells as well as polygonal cells. The nuclei show marked pleomorphism and hyperchromatism. Occasional mitoses are present. Irregular new bone is being formed. Compare the bone in the neoplasm to that on the other side of the epiphysis which is normal.
Patients often equate a history of trauma with appearance of a neoplasm.
Trauma is not considered to be an etiology for neoplasia. Radiographic procedures can show the location and appearance of the neoplasm and what tissues are involved. Radiographs can be correlated with the histologic appearance. If the tumor is making osteoid, then it is probably primary to bone.