Background Diabetes mellitus is a syndrome of disturbed energy metabolism involving carbohydrate, protein, and fat brought about by absolute or relative deficiency of insulin secretion, or resistance to insulin actions at various tissue sites. DM is not a single entity, but a heterogeneous group of disorders in which there are distinct genetic patterns, as well as other etiological and pathophysiological mechanisms that lead to impairment of glucose tolerance.

Case Report(s) 15-year- old girl has history of features diabetes that do not resemble features of type- 1-. She has been diagnosed wrongly as having type-1- diabetes

Conclusion(s) Any patient who has features of hyperglycaemia with clinical and laboratory findings different from that of type-1- should be assessed for other of diabetes.