"Chondroblastoma-like" epithelioid fibrous histiocytoma: A previously undescribed and potentially confusing variant.

To the best of our knowledge, epithelioid fibrous histiocytomas showing "chondroblastoma-like" calcification have not been previously reported. The chief significance of this finding seems to be in its potential for confusion with other calcifying tumors of the skin and subcutis. Awareness that epithelioid fibrous histiocytomas may show this unusual morphological finding, careful morphological evaluation and ancillary immunohistochemical studies, including ALK protein, should allow for their confident diagnosis in essentially all instances.