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