What causes a carcinoid tumor?

What causes a carcinoid tumor?

Researchers don’t know what triggers the cell growth that causes carcinoid tumors. They have, however, linked them to inherited syndromes, including:

• Multiple endocrine neoplasia type 1 (MEN1), which causes your thyroid, parathyroid or adrenal glands to be overactive or form tumors.
• Multiple endocrine neoplasia type 2 (MEN2), which causes your pancreas, pituitary or parathyroid to be overactive or form tumors.
• Von Hippel-Lindau syndrome, a rare condition where benign tumors grow in various parts of your body.
• Neurofibromatosis type 1, a rare condition where tumors grow on your skin and nerves, affecting your eyes and other parts of your body.