**Question:** Buerger's disease usually affects all of the following except: September 2009, 2010

**Core Concept:** Buerger's disease, also known as Thromboangiitis Obliterans, is a rare inflammatory disorder that primarily affects the small and medium-sized veins, arteries, and capillaries in the hands and feet. It is a clinical entity characterized by occlusive thrombosis and inflammation in the affected vessels, leading to tissue ischemia and ulceration.

**Why the Correct Answer is Right:**

Correct Answer: **D.** September 2009, 2010

Buerger's disease primarily affects individuals who are heavy tobacco users, especially those smoking Indian opium (called "gutka" or "pan") that is often mixed with areca nut and slaked lime. The disease is named after the German physician Franz Buerger, who first described the condition in 1908. While tobacco use is a major risk factor, selecting the years 2009 and 2010 as exclusion criteria is incorrect because:

1. **A. 2008:** Buerger's disease typically manifests in individuals under the age of 40 years, often presenting within the first 10 years of tobacco usage. Selecting a year before the disease onset is irrelevant to the diagnostic criteria.
2. **B. 2011:** Although the disease may affect individuals after 2011, selecting a year after the disease onset is irrelevant to the diagnostic criteria.
3. **C. Diagnostic Criteria:** Buerger's disease is diagnosed based on clinical findings, including:
- Painful rest pain in the extremities
- Recurrent ulceration and gangrene
- Atypical digital ischemia
- Digital ulcers and gangrene
- Raynaud's phenomenon
- Presence of tobacco use (usually within the first 10 years of use)

**Why Each Wrong Option is Incorrect:**

1. **A. 2008:** Chronological year (before disease onset) is irrelevant to the diagnostic criteria.
2. **B. 2011:** Chronological year (after disease onset) is irrelevant to the diagnostic criteria.
3. **C. Diagnostic Criteria:** The disease is diagnosed based on clinical findings, not specific years. The disease typically presents with the following symptoms:
- Painful rest pain in the extremities
- Recurrent ulceration and gangrene
- Atypical digital ischemia
- Digital ulcers and gangrene
- Raynaud's phenomenon
- Presence of tobacco use (usually within the first 10 years of use)

**Clinical Pearl:** Buerger's disease is a clinical diagnosis based on the presence of specific symptoms and signs, not years, hence selecting a year (A or B) as a diagnostic criterion is incorrect. The condition primarily affects young adults and smokers, particularly those using Indian opium or "gutka"