Which set of symptoms constitutes the classic triad of type 1 diabetes presentation?

• A. Polyphagia, polyuria, weight gain
• B. Polyuria, polydipsia, weight loss
• C. Polyphagia, polydipsia, weight loss
• D. Polyuria, dehydration, weight loss

Answer: (B)

The classic presentation of type 1 diabetes in children centers on polyuria, polydipsia, and weight loss. When insulin is deficient, glucose stays in the blood and spills into the urine, drawing water with it. That osmotic diuresis causes frequent urination and, as a result, dehydration triggers increased thirst. Because the body's cells can’t use glucose effectively, it shifts to breaking down fat and muscle for energy, leading to unintentional weight loss (even if appetite is maintained or elevated). Polyphagia and weight gain don’t fit this typical pattern, and while dehydration can occur, the hallmark trio specifically involves increased urination, increased thirst, and weight loss.