Rare diseases · Sign or symptom
Carcinoid tumor
HP:0100570
What it means
A tumor formed from the endocrine (argentaffin) cells of the mucosal lining of a variety of organs including the stomach and intestine. These cells are from neuroectodermal origin.
In everyday care
Most people with this sign do not have a rare disease — it appears in common conditions far more often. These general reference pages cover the same topic:
Rare diseases that can present with this13
Always100%
6Sometimes5–29%
4The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions, and Orphanet separately records 1 disease where this sign is specifically absent. A sign on this page is a conversation to have with a clinician, not a conclusion.
Part of the broader category
Also called: Carcinoid · Carcinoid tumors · Carcinoid tumour · Carcinoid tumours
Tracking symptoms like this for someone? Eleplan keeps symptoms, diagnoses, medications and every specialist in one plan.
Start free with EleplanThis page uses the Human Phenotype Ontology (2026-06-23) — Human Phenotype Ontology Consortium, hpo.jax.org. Disease associations from Orphanet (INSERM), CC BY 4.0. Content is educational and is not medical advice.