Granular cell tumor in the pulmonary tree

Granular cell tumors are often benign growths of the tongue, dermis, and subcutaneous tissues. Rarely, we see production in the pulmonary system. These schwannian and histiocyte origin tumors in the lungs are called pulmonary granulocyte tumors. While granular cell tumors are rare, pulmonary granulocyte tumors are even rarer, with less than eighty-five cases described since the 1930s. Herein, we introduce these rare growths and provide a review of known epidemiological evidence and pathophysiology.