[Granular cell tumor of the vermiform appendix. Case presentation with discussion of histogenesis]

Granular cell tumor is a rare lesion to the appendix. A case of that kind was recorded by the authors from a man, 32 years of age, who underwent surgery for appendicitis. Presence of a granular cell tumor was histologically, histochemically, and immunohistologically verified. Histogenesis of granular cell tumors is not well known, which prompted the authors to summarise some of their recent findings for discussion.