Expert Opinion :
Since reducing substance was positive in urine, one must rule out galactosuria and galactosemia. Galactosemia is of 3 types. Type 1 and 3 are due to transferase and epimerase enzyme deficiency respectively and present with jaundice, hepatomegaly, hypoglycemia which may lead to seizures, failure to thrive, and acidosis, and cataracts. Type 2 galactosemia (Galactokinase deficiency) leads to cataracts without any other systemic manifestation. Thus in this child galactosemia type, 2 is a possibility. Enzyme estimation of Galactokinase showed low levels.