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epithelioid multinodular osteoblastoma

Friday 5 October 2007

Definition: osteoblastoma with a multinodular growth pattern (defined as multiple nidi in a single tumor) and primarily epithelioid-appearing cells. Variant of osteoblastoma.


- multiple nodules of epithelioid cells
- lacy, blue-bone matrix
- +/- sheets of cells with no matrix


- Zon Filippi R, Swee RG, Krishnan Unni K. Epithelioid multinodular osteoblastoma: a clinicopathologic analysis of 26 cases. Am J Surg Pathol. 2007 Aug;31(8):1265-8. PMID: 17667552