A 47-year-old man with polydipsia and nocturia; diagnosis?

A 47-year-old man with polydipsia and nocturia; diagnosis?

• A. Type 2 diabetes
• B. Type 1 diabetes
• C. Diabetes insipidus
• D. Hyperglycemia

Answer: (A)

Polydipsia and nocturia in a middle-aged adult point to high blood glucose causing osmotic diuresis. When glucose exceeds the renal threshold, it spills into the urine and pulls water with it, leading to increased urine volume and thirst. In someone around this age, the most likely form is type 2 diabetes due to its high prevalence and typical age of onset. Diabetes insipidus would also cause thirst and large urine volumes, but urine is usually dilute and blood glucose is not elevated, so it doesn’t fit this pattern as well. Hyperglycemia is a state you’d confirm with tests rather than a standalone diagnosis. So the presentation best fits type 2 diabetes.

Polydipsia and nocturia in a middle-aged adult point to high blood glucose causing osmotic diuresis. When glucose exceeds the renal threshold, it spills into the urine and pulls water with it, leading to increased urine volume and thirst. In someone around this age, the most likely form is type 2 diabetes due to its high prevalence and typical age of onset. Diabetes insipidus would also cause thirst and large urine volumes, but urine is usually dilute and blood glucose is not elevated, so it doesn’t fit this pattern as well. Hyperglycemia is a state you’d confirm with tests rather than a standalone diagnosis. So the presentation best fits type 2 diabetes.