Cutaneous marker of HIV is –
**Core Concept**
The question is testing the knowledge of a specific cutaneous manifestation associated with Human Immunodeficiency Virus (HIV) infection. This manifestation is a result of the compromised immune system in HIV-infected individuals, making them more susceptible to various opportunistic infections and conditions.
**Why the Correct Answer is Right**
The correct answer is **Kaposi's sarcoma**. Kaposi's sarcoma is a type of cancer that forms in the lining of blood and lymph vessels. It is a common opportunistic infection in people with HIV/AIDS, particularly those with a weakened immune system. The pathogenesis of Kaposi's sarcoma involves the human herpesvirus 8 (HHV-8) infection, which is thought to be a causative agent. The virus infects the endothelial cells of blood vessels, leading to the formation of abnormal blood vessels and the characteristic lesions seen in Kaposi's sarcoma.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not specify a cutaneous marker of HIV. While various skin conditions can be associated with HIV, this option is too vague to be correct.
**Option B:** This option is incorrect because it does not accurately represent a cutaneous marker of HIV. While oral hairy leukoplakia is a condition associated with HIV, it is primarily an oral manifestation and not a cutaneous one.
**Option C:** This option is incorrect because it is not a specific cutaneous marker of HIV. While seborrheic dermatitis can be more common in people with HIV, it is not a specific marker of the disease.
**Clinical Pearl / High-Yield Fact**
Kaposi's sarcoma is a classic example of an opportunistic infection that can occur in people with HIV/AIDS. It is often associated with a poor prognosis and requires prompt treatment.
**Correct Answer:** C. Kaposi's sarcoma.