Hilar pulmonary granular cell tumor: a case report and review of the literature.

We present a case of pulmonary granular cell tumor (GCT). A 35-year-old man underwent pulmonary resection for metastatic testicular mixed germ cell tumor when two interlobar lymph nodes were found to be enlarged and abnormal. Intraoperative frozen section examination showed their involvement by GCT. Histologic examination of the lobectomy specimen showed a benign, predominantly hilar GCT as well as metastatic germ cell tumor. This location, with no endobronchial component and with extension into regional hilar lymph nodes, is unusual. The differential diagnosis and the association with the metastatic testicular cancer are discussed and the literature on pulmonary GCT is reviewed.