Gastrointestinal endocrine tumors.
D007516:Adenoma, Islet Cell / Q000378:metabolism; D002276:Carcinoid Tumor / Q000378:metabolism; D005770:Gastrointestinal Neoplasms / Q000378:metabolism*; D006729:Hormones, Ectopic / Q000378:metabolism*; D006801:Humans
D006729:Hormones, Ectopic