Which population is at highest risk for malignant otitis externa?

Which population is at highest risk for malignant otitis externa?

• A. Healthy young adults
• B. Smokers
• C. Children under 5
• D. Diabetic or immunocompromised

Answer: (D)

Malignant otitis externa is a severe, invasive infection of the external ear canal that can extend to the skull base, and it mainly occurs in people with impaired host defenses. The best-supported risk group is those with diabetes or other forms of immune compromise. Diabetes contributes to higher risk through vascular changes and poor tissue perfusion, impaired neutrophil function, and often higher ear canal glucose, all of which blunt local immune response and allow the infection to spread more readily. Immunocompromised individuals—whether due to medications, HIV, cancer, or other conditions—also have diminished ability to contain the infection and prevent progression. In contrast, healthy young adults, children, or smokers do not have the same level of immune or vascular vulnerability, so malignant otitis externa is far less common in those groups. Recognizing these risk factors helps explain why this population is most at risk and underscores the need for prompt, aggressive treatment when symptoms suggest this severe infection.

Malignant otitis externa is a severe, invasive infection of the external ear canal that can extend to the skull base, and it mainly occurs in people with impaired host defenses. The best-supported risk group is those with diabetes or other forms of immune compromise. Diabetes contributes to higher risk through vascular changes and poor tissue perfusion, impaired neutrophil function, and often higher ear canal glucose, all of which blunt local immune response and allow the infection to spread more readily. Immunocompromised individuals—whether due to medications, HIV, cancer, or other conditions—also have diminished ability to contain the infection and prevent progression. In contrast, healthy young adults, children, or smokers do not have the same level of immune or vascular vulnerability, so malignant otitis externa is far less common in those groups. Recognizing these risk factors helps explain why this population is most at risk and underscores the need for prompt, aggressive treatment when symptoms suggest this severe infection.