[Renal glycosuria: report of two cases].

Glycosuria as an accidental finding implies a diagnostic workout. We present the cases of two asymptomatic female teenagers referred to a hospital outpatient clinic due to isolated glycosuria detected in a routine analysis. The diagnostic workout revealed isolated glycosuria in the absence of other abnormalities. The genetic study confirmed the diagnosis of renal glycosuria, by revealing SCL5A2 gene mutations. Renal glycosuria is characterized by persistent glycosuria in the absence of hyperglycaemia or generalized renal tubular dysfunction. It's usually asymptomatic and has good prognosis. The authors call the attention to this rare entity, since it can be the reason for reference to a hospital outpatient clinic, underlining the importance of a differential diagnosis with more serious diseases that require proper treatment.