Ileal neuroendocrine tumor

What it is

Ileal neuroendocrine tumor is a rare, primary, malignant, epithelial neoplasm of the small intestine arising from enterochromaffin cells in the ileum (usually the terminal ileum). Clinical behavior depends on the histologic grade, but initially it is generally characterized by vague abdominal symptoms (cramping, bloating, diarrhea) with insidious onset, although sometimes it could present with signs of bowel obstruction/perforation or gastrointestinal bleeding. Diagnosis in advanced stages with regional or distant spread is common, but signs of carcinoid syndrome (flushing, sweating, diarrhea) are usually not apparent until hepatic metastasis has occurred.

Key facts

Age of onset

Adult

Inheritance

Not applicable

Classified as

Disease

Signs and symptoms

These ranges are how often a sign appears across everyone diagnosed, not a prediction for one person — most people have some of these and not others. Orphanet also records findings that are specifically absent in this disease; those are in the data but not listed here.

ICD-10 codes

ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.

Related health topics

Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.

Cross-references