Symptoms vary depending on where the tumor develops and whether it produces hormones.
Common symptoms may include:
- Abdominal pain or discomfort
- Persistent diarrhea
- Flushing of the skin
- Unexplained weight loss
- Nausea or vomiting
- Fatigue
- Wheezing or shortness of breath
- Changes in bowel habits
- Loss of appetite
- A lump or mass
Some patients experience symptoms related to hormone overproduction, including:
- Episodes of flushing
- Rapid heartbeat
- Excessive sweating
- Low blood sugar
- Recurrent stomach ulcers
Because these symptoms can resemble many other conditions, neuroendocrine tumors are sometimes difficult to diagnose.
