Which condition is a leading cause of end-stage renal disease?

• A. Obesity
• B. Dehydration
• C. Chronic kidney infection
• D. Diabetes

Answer: (D)

Diabetes mellitus is the condition most likely to progress to end-stage renal disease because its long-term high blood sugar gradually damages the kidneys, a process called diabetic nephropathy. Chronic hyperglycemia, along with hypertension that often accompanies diabetes, injures the tiny vessels in the kidneys. This injury leads to thickening of the glomerular basement membrane, expansion of the mesangium, and scar formation (nodular glomerulosclerosis), causing a steady loss of filtering units over years. As kidney function declines, albumin leaks into the urine and the glomerular filtration rate falls, eventually reaching a level that requires dialysis or transplantation. This pattern makes diabetes a leading cause of ESRD in many populations, and managing blood glucose and blood pressure, plus kidney-protective therapies, can slow the progression.

Obesity increases risk and is associated with kidney disease, but it is not the primary driver of ESRD. Dehydration can cause acute kidney injury, especially with severe or repeated episodes, rather than directly causing the chronic, progressive loss seen in ESRD. Chronic kidney infection can lead to kidney scarring over time, but it is not the predominant cause of ESRD compared with diabetic nephropathy.