The book is a study that aims to assess the prevalence of non alcoholic fatty liver disease in diabetic patients attending referred clinic of Kosti Teaching Hopital in Sudan from 1/2/2019 to 1/10/2019.Also it is atrial to find if there is certain age, sex, residence more liable to have the disease.The study was case control hospital based comprised patients with diabetes , diabetes associated with hypertension and diabetes associated with coronary artery diseases.