A 35 years old man Ramu has fasting and post prandial blood sugar within normal limit but urine sugar is 3 plus (+++). The diagnosis is.
Renal Glycosuria
Pancreatic insufficiency
Alimentary glycosuria
High carbohydrate diet taken in the morning
Answer is A (Renal Glycosuria): 'Renal glycosuria' is characterized by urinary excretion of glucose at normal concentration of glucose in blood: Patient in question is testing positive for urinary glucose despite normal levels of both fasting and postprandial glucose in blood. This thus leads us to the diagnosis of renal glycosuria.