What is the common symptom of mucosal neuroma observed in MEN2b?

• A. Skin lesions
• B. Oral mucosal changes
• C. Joint pain
• D. Visual disturbances

Answer: (B)

In patients with multiple endocrine neoplasia type 2B (MEN 2B), mucosal neuromas are a hallmark feature. These mucosal neuromas are benign tumors that arise from the neural crest-derived cells and typically involve the oral cavity, particularly affecting the lips, tongue, and buccal mucosa.

Oral mucosal changes manifest as nodular growths or thickened areas in these regions, which can be noticed during a clinical examination. This symptom aligns with the distinctive nature of MEN 2B, as mucosal neuromas are particularly characteristic of this condition.

Skin lesions, while they can be seen in association with other similar syndromes or conditions, do not specifically highlight the presence of mucosal neuromas. Joint pain and visual disturbances are not primary symptoms associated with MEN 2B or mucosal neuromas and are not typical findings in this syndrome. Therefore, the presence of oral mucosal changes is the defining symptom related to mucosal neuromas in MEN 2B.