Buerger's Disease (Thromboangiitis Obliterans) — Statement Analysis
Buerger's disease is a non-atherosclerotic, segmental inflammatory disease affecting the small and medium-sized arteries and veins of the extremities, strongly linked to tobacco use.
- Statement 1: It involves small to medium arteries — Correct. Buerger's disease classically affects the small and medium-sized arteries (and accompanying veins and nerves) of the distal upper and lower limbs, sparing large vessels.
- Statement 2: It is common in smokers — Correct. Tobacco use (smoking or chewing) is the single most important etiological and perpetuating factor; the disease is rare in non-users of tobacco, and continued use is associated with disease progression and amputation.
- Statement 3: It commonly involves lower limb vessels — Correct. Although upper limb vessels can be affected, the lower limb (especially infrapopliteal) vessels are most commonly and severely involved, presenting with claudication, rest pain, ischemic ulcers, and gangrene of the digits.
- Statement 4: Cessation of smoking reverses the disease process — Incorrect. Smoking cessation is the only proven measure to halt/arrest progression of the disease and prevent further amputations, but it does not reverse already-established vascular occlusion, ischemic tissue damage, or gangrene. Damaged segments remain damaged; cessation prevents new lesions rather than undoing existing ones.
Selecting the Correct Option
- Option 2 (1, 2 and 3) is correct — it captures the accurate pathological features: small-to-medium vessel involvement, strong smoking association, and predominant lower limb disease.
- Option 1 (1, 2 and 4) is incorrect because it wrongly includes statement 4, overstating smoking cessation as "reversing" rather than merely halting the disease.
- Option 3 (1, 3 and 4) is incorrect as it omits the crucial smoking association (statement 2) while including the flawed statement 4.
- Option 4 (2, 3 and 4) is incorrect as it omits the vessel-size feature (statement 1) while including the flawed statement 4.
Therefore, the correct answer is 1, 2 and 3.