“neuroendocrine tumors are highly vascularized”—full of blood vessels on which they depend for nutrients, says Kulke.
Other neuroendocrine tumors produce gastrin, glucagon, and other digestive hormones.
In part, that is because neuroendocrine cancers tend to be quite slow growing, or indolent.
neuroendocrine neu·ro·en·do·crine (nur'ō-ěn'də-krĭn, -krēn', -krīn', nyur'-)
Of, relating to, or involving the interaction between the nervous system and the hormones of the endocrine glands.
Of or relating to the cells that release a hormone into the blood in response to a neural stimulus.