**Question:** Mulberry mucosa is seen in -

A. Cheilitis
B. Angiofibromas
C. Oral lesions
D. Nasal mucosa

**Core Concept:** Mulberry mucosa refers to the appearance of mucosal lesions characterized by multiple small, dark, and elevated papules in a "mulberry-like" pattern. This term is typically used to describe mucosal lesions that are typically seen in chronic mucocutaneous candidiasis and oral lesions.

**Why the Correct Answer is Right:** Mulberry mucosa is seen in D - Nasal mucosa. This pattern is characteristic of chronic mucocutaneous candidiasis, a condition caused by the deficiency of specific proteins called defensins, which are crucial for maintaining the normal mucosal flora and preventing fungal infections. In this case, the body's immune system cannot effectively fight off Candida species, leading to chronic mucocutaneous candidiasis and the characteristic "mulberry" appearance in mucosal surfaces like the nasal mucosa.

**Why Each Wrong Option is Incorrect:**

A - Cheilitis: Cheilitis refers to inflammation of the lips, not the appearance of mucosal lesions. While it can be associated with candidiasis, the correct term for mucosal lesions in this context is "mucocutaneous candidiasis."

B - Angiofibromas: Angiofibromas are benign tumors composed of blood vessels and connective tissue and are not related to the appearance of mucosal lesions.

C - Oral lesions: While mucocutaneous candidiasis can present with oral lesions, the correct term for mucosal lesions is "oral lesions." Mulberry mucosa specifically refers to the appearance of these lesions in chronic mucocutaneous candidiasis.

**Clinical Pearl:** Chronic mucocutaneous candidiasis is an important differential diagnosis to consider in patients presenting with mucocutaneous lesions, particularly in those with compromised immune systems (e.g., HIV infection, organ transplant recipients). A thorough clinical history and examination, including mucosal surfaces, can help narrow down the diagnosis and guide appropriate management.

**Correct Answer:** D - Nasal mucosa

Mulberry mucosa is seen in the nasal mucosa, which is a characteristic feature of patients with chronic mucocutaneous candidiasis. This condition is caused by a deficiency of defensins, which are crucial for maintaining normal mucosal flora and preventing fungal infections. As a result, the body cannot effectively fight off Candida species, leading to the characteristic "mulberry" appearance in mucosal surfaces, including the nasal mucosa.