What’s the difference between an endocrine tumour and a neuroendocrine tumour?

Neuroendocrine tumours (NETs) are a specific type of endocrine tumour that form in specialised cells, called neuroendocrine cells. These cells blend functions of both the nervous and endocrine systems by responding to nerve signals and releasing hormones. All NETs are endocrine tumours because they involve endocrine cells, but only a small section of endocrine tumours are NETs.