Gastrointestinal granular cell tumour, endometriosis and appendiceal intussusception-a unique report

Granular cell tumours (GCT) are uncommon, typically benign growths that can appear in various parts of the body, though they most frequently manifest in the oral cavity. The overall frequency of GCT in surgical samples is under 0.05%. Between 5% and 11% of GCT cases are found within the gastrointestinal system, with the oesophagus, colon, and stomach being the most commonly affected sites. This article presents a rare case of appendiceal intussusception caused by an endometriosis nodule, which led to the discovery of a granular cell tumour in the surgical specimen.