Pindborg tumor.

Clinical and histopathologic features of the Pindborg tumor are described. The diagnosis is based on the histological examination revealing areas of polyhedral neoplastic cells, amyloid, and calcified deposits. Since calcifications were missing in the present case, it is considered to be a variant of the Pindborg tumor. Although the features of the hyaline deposits did not fulfill all the morphological criteria of amyloid in other cases, there was difference in the course of the disease. The tumor may recur after excision. Metastases, however, have not been described.