Symptoms

Neuroendocrine tumors don't always cause signs and symptoms at first. The symptoms you might experience depend on the location of your tumor and whether it produces excess hormones.

In general, neuroendocrine tumor signs and symptoms might include:

• Pain from a growing tumor
• A growing lump you can feel under the skin
• Feeling unusually tired
• Losing weight without trying

Neuroendocrine tumors that produce excess hormones (functional tumors) might cause:

• Skin flushing
• Diarrhea
• Frequent urination
• Increased thirst
• Dizziness
• Shakiness
• Skin rash

When to see a doctor

Make an appointment with your doctor if you have any persistent signs and symptoms that worry you.