Benign fibrous histiocytoma of the maxilla.

Benign fibrous histiocytomas of bone are unusual neoplasms that often are confused with metaphyseal fibrous defects. Although the two lesions have overlapping microscopic characteristics, they differ in their clinicopathologic presentations. This report describes the clinicopathologic features of the first reported case of benign fibrous histiocytoma involving the maxilla and the fourth description of this tumor in the jawbones. In addition, the concept of fibrohistiocytic lesions of bone is discussed with consideration of their pathologic classification and their clinical, radiographic, and microscopic differential diagnosis.