Somatostatinoma, also known as pancreatic endocrine carcinoma, is related to jejunal somatostatinoma and cholelithiasis, and has symptoms including diarrhea An important gene associated with Somatostatinoma is SST (Somatostatin), and among its related pathways/superpathways are Class A/1 (Rhodopsin-like receptors) and GPCR downstream signalling. The drugs Octreotide and Somatostatin have been mentioned in the context of this disorder. Affiliated tissues include Pancreas and small intestine, and related phenotypes are nausea and vomiting and constipation