**Core Concept**
Lupus vulgaris is a chronic, progressive form of cutaneous tuberculosis caused by the bacterium Mycobacterium tuberculosis. It is characterized by the formation of large, necrotic lesions on the skin, often accompanied by scarring and disfigurement.

**Why the Correct Answer is Right**
Lupus vulgaris occurs when M. tuberculosis infects the skin, often through the respiratory tract. The bacteria cause an inflammatory response, leading to the formation of granulomas and eventually, the characteristic skin lesions. The disease can be treated with antibiotics, but if left untreated, it can lead to severe scarring and disfigurement.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because lupus vulgaris is not a type of autoimmune disease, but rather a bacterial infection caused by M. tuberculosis.
**Option B:** This option is incorrect because lupus vulgaris does not typically present with systemic symptoms such as fever and joint pain, which are more characteristic of systemic lupus erythematosus (SLE).
**Option C:** This option is incorrect because lupus vulgaris is not a type of skin cancer, but rather a chronic bacterial infection.

**Clinical Pearl / High-Yield Fact**
Lupus vulgaris is often referred to as the "tuberculosis of the skin" and is a classic example of a cutaneous manifestation of an underlying systemic infection. It is essential to consider this diagnosis in patients with chronic skin lesions and a history of tuberculosis exposure.

**Correct Answer: D.**