In diabetic nephropathy, the typical initial abnormal finding is:

• A. Microalbuminuria
• B. Hematuria
• C. Pyuria
• D. Casts

Answer: (A)

In diabetic nephropathy, the earliest abnormal change is the leakage of small amounts of albumin into the urine, known as microalbuminuria. This happens because long-standing high blood sugar causes subtle damage to the glomerular filtration barrier, making it more permeable to albumin. Detecting microalbuminuria is important because it appears before changes in kidney function (like rising creatinine or reduced GFR) and before overt proteinuria develops, signaling the start of kidney involvement and the need to intensify glycemic and blood pressure control. Hematuria and pyuria are not typical early findings of this condition—they suggest other processes like infection or glomerular inflammation. Casts can be present in various kidney diseases and are not specific for the early stage of diabetic nephropathy.