Giant cell tumor of the larynx.

Among the more uncommon tumors that may sometimes be encountered in the laryngeal region is the recently described giant cell tumor of the larynx. This lesion is a true neoplasm, presumably of the fibrohistiocytic series. Histologically, it closely resembles the more familiar true giant cell tumor of long bone. The laryngeal giant cell tumors appear, to date, to be nonmetastasizing lesions; it is possible that they may recur locally if incompletely excised (although this remains to be demonstrated). In view of the rarity of these tumors, a tentative diagnosis of such a neoplasm should always prompt consideration of other (more frequently encountered) differential diagnostic possibilities, including cytologically malignant giant cell-rich tumors such as malignant fibrous histiocytoma and sarcomatoid carcinoma.