epithelioid multinodular osteoblastoma
Definition: osteoblastoma with a multinodular growth pattern (defined as multiple nidi in a single tumor) and primarily epithelioid-appearing cells. Variant of osteoblastoma.
Synopsis
multiple nodules of epithelioid cells
lacy, blue-bone matrix
+/- sheets of cells with no matrix
References
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#