Which three microvascular complications are most commonly associated with diabetes?

• A. Retinopathy, nephropathy, and neuropathy
• B. Coronary artery disease, stroke, heart failure
• C. Peripheral arterial disease, varicose veins, venous insufficiency
• D. Pulmonary hypertension, bronchitis, pneumonitis

Answer: (A)

Damage to small blood vessels from long-standing high blood glucose is the key idea. In diabetes, microvascular complications affect the eyes, kidneys, and nerves most classically. Retinopathy involves damage to the tiny vessels in the retina, causing vision problems and can lead to blindness if not managed. Nephropathy refers to injury of the glomerular capillaries in the kidneys, often starting with microalbuminuria and potentially progressing to kidney failure. Neuropathy is nerve damage, typically starting in the feet and legs, causing numbness, tingling, pain, and increased risk of foot ulcers.

These three are the standard trio of microvascular complications because they arise from the same underlying capillary damage and are most strongly linked to the duration and control of diabetes. The other options point to conditions that are primarily macrovascular or non-microvascular issues (like coronary disease, stroke, or venous problems), which, while diabetes increases risk for them, are not categorized as microvascular complications.