Diabetic Neuropathy and Chemotherapy-induced peripheral neuropathy are referred to as comorbidities. Comorbidity is when you have a secondary health issue. When it comes to diabetic neuropathy, the diabetes is the main disease. For the CIPN (Chemotherapy-induced peripheral neuropathy ) the cancer is the main pathology. For alcoholic neuropathy, you can easily see where the neuropathy is originating from.
In all pathologies mentioned there is a lack of blood circulation to the extremities, the parts of the body outermost far from the heart.