Monckeberg sclerosis is usually clinically insignificant unless accompanied by which condition?

• A. Hypertension
• B. Atherosclerosis
• C. Diabetes mellitus
• D. Hyperlipidemia

Answer: (B)

Monckeberg medial calcific sclerosis involves calcification of the tunica media in medium-sized arteries, which makes the vessels stiff but usually does not narrow the lumen, so it’s often clinically silent. It becomes clinically significant when there is concurrent atherosclerotic disease, because the intimal plaques from atherosclerosis reduce the vessel’s lumen and, together with the stiffened, calcified wall, impair blood flow. This combination can lead to symptoms like claudication or ischemia. The other factors listed (hypertension, diabetes, hyperlipidemia) are risk factors that promote atherosclerosis, but on their own they don’t explain why Monckeberg’s sclerosis would become symptomatic; it’s the presence of atherosclerosis that reveals its clinical impact.