**Question:** Examination of mouth of a patient with HIV/AIDS may commonly reveal

A. Oral candidiasis
B. Gingivitis
C. Salivary gland enlargement
D. Periodontal disease

**Correct Answer:** C. Salivary gland enlargement

**Core Concept:** HIV/AIDS is a condition caused by the human immunodeficiency virus (HIV), which primarily targets CD4+ T cells, leading to a weakened immune system and increased susceptibility to opportunistic infections and cancers. HIV primarily affects the oral cavity, leading to various oral manifestations.

**Why the Correct Answer is Right:** Salivary gland enlargement, also known as sialadenitis, is a common oral finding in HIV/AIDS patients. HIV can directly infect and damage salivary glands, causing an increased secretion of saliva and leading to the enlargement of salivary glands. This is due to the destruction of the salivary gland acinar cells and ductal cells, which results in the accumulation of saliva in the glands.

**Why Each Wrong Option is Incorrect:**

A. Oral candidiasis (oral thrush) is a fungal infection caused by Candida species, not directly related to HIV/AIDS. While HIV-infected individuals may be more susceptible to candidiasis, it is not a typical oral manifestation of HIV/AIDS.

B. Gingivitis (inflammation of the gums) is an early stage of periodontal disease (gingivitis leads to periodontitis) and is not specific to HIV/AIDS. While HIV/AIDS patients are more prone to gingivitis due to the weakened immune system, it is not a typical oral manifestation of HIV/AIDS.

D. Periodontal disease (including gingivitis and periodontitis) is a condition involving the destruction of the supporting tissues of the teeth, which is less specific to HIV/AIDS than salivary gland enlargement. Although HIV/AIDS patients are more prone to periodontal diseases due to the weakened immune system, salivary gland enlargement is a more specific manifestation of HIV/AIDS.

**Clinical Pearl:** Salivary gland enlargement is a crucial finding to identify in patients with HIV/AIDS, as it can guide the clinician towards a suspected HIV infection and prompt further diagnostic steps, including HIV testing. This can lead to early diagnosis and initiation of antiretroviral therapy, improving the patient's prognosis and quality of life.

**Core Concept:** Salivary gland enlargement is a common oral manifestation of HIV/AIDS, reflecting the direct and indirect effects of HIV infection on salivary glands. The indirect effects include opportunistic infections and malignancies, which can lead to salivary gland enlargement. HIV can cause a decrease in CD4+ T cells, making the patient more susceptible to infections and cancers.

**Why Each Wrong Option is Incorrect:**

1. Oral candidiasis (oral thrush) is a fungal infection caused by Candida species. While HIV-infected patients are more prone to oral candidiasis due to the weakened immune system, salivary gland enlargement is a more specific manifestation of HIV infection.

2. Period