What are the types of gastrointestinal neuroendocrine tumors?
Neuroendocrine tumors can be non-cancerous (benign) or cancerous. If the tumor is cancerous, it is called a neuroendocrine cancer. Neuroendocrine cancers – also called neuroendocrine carcinomas – can spread to other organs. The types of neuroendocrine cancers are based on how the cancer cells look:
- Well-differentiated neuroendocrine cancers - these tumors do not look very abnormal and grow slowly.
- Poorly-differentiated neuroendocrine cancers - these tumors look very abnormal and spread quickly.
- Moderately-differentiated neuroendocrine cancers - these cancers share features of poorly-differentiated and well-differentiated cancers.