Talk:Chondro-osseous tumours

Osteoid osteoma

Microscopic description

The sections show blood, fragments of lamellar bone and a small fragment of lesional tissue consisting of anastomosing bony trabeculae rimmed with osetoblasts, and osteoid with variable degrees of calcification. There is no nuclear atypia, necrosis or mitotic activity. Occasional multinucleated-giant cells with abundant eosinophilic cytoplasm are present.

Final diagnosis

Bone, right hip, biopsy - scant lesional tissue with features consistent with an osteoid osteoma, see comment.

Comment

The lesional fragment is very small (largest dimension is measured as 0.22 cm). The scant lesional component of this small biopsy may not be representative of the lesion as a whole. If atypical clinical or radiologic features are present, or arise in follow-up, a re-biopsy should be considered.