## Most Common Site of Basal Cell Carcinoma **Key Point:** The **face** is the most common site for BCC in Indian and most populations, accounting for 80–90% of all cases. Within the face, the **nose and perinasal area** are the single most frequent locations, followed by the cheek, forehead, and periorbital region. ### Anatomical Distribution | Site | Frequency | Characteristics | | --- | --- | --- | | **Face (nose, cheek, forehead)** | 80–90% | Sun-exposed, thin skin, high Mohs micrographic surgery success | | Trunk | 10–15% | Usually larger at presentation, higher recurrence | | Lower extremities | 3–5% | Rare, often infiltrative variants | | Scalp/ears | 2–3% | Often aggressive, higher recurrence | ### Why the Face? 1. **Chronic UV exposure** — face receives the highest cumulative solar radiation over a lifetime 2. **Thin epidermis** — facial skin is thinner, allowing deeper UV penetration 3. **Occupational exposure** — outdoor workers, farmers, and construction workers in India have high facial BCC rates 4. **Genetic predisposition** — fair-skinned individuals and those with xeroderma pigmentosum are at highest risk **High-Yield:** The **nose** (especially the nasolabial fold and ala) is the single most common site within the face. BCC on the nose often presents as a pearly nodule with central ulceration (rodent ulcer). **Clinical Pearl:** BCC on sun-exposed sites (face, ears, neck) tends to be more indolent and responsive to treatment, whereas BCC on the trunk or lower extremities (non-sun-exposed areas) is often more aggressive and infiltrative, suggesting a different pathogenic mechanism (Gorlin syndrome, genetic mutations). **Tip:** In NEET PG exams, when asked about BCC site frequency, always default to **face** — it is correct in >85% of cases. The nose is the most common site *within* the face.
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