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Malignant external otitis in nondiabetic patients

T Shpitzer¹, Y Stern, O Cohen

¹Department of Otolaryngology-Head and Neck Surgery, Beilinson Medical Center, Petah-Tiqva, Israel.

The Annals of Otology, Rhinology, and Laryngology

|November 1, 1993

Summary

Malignant external otitis can occur in patients without diabetes. This study highlights key characteristics of this condition in nondiabetic individuals, emphasizing Pseudomonas aeruginosa infection.

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Area of Science:

Otolaryngology
Infectious Diseases
Diabetology

Background:

Malignant external otitis (MEO) is traditionally associated with diabetes mellitus.
The role of diabetes in the pathogenesis of MEO requires further investigation.

Purpose of the Study:

To identify and characterize a cohort of nondiabetic patients diagnosed with malignant external otitis.
To challenge the traditional belief linking MEO exclusively to diabetes.

Main Methods:

Retrospective analysis of 30 patients diagnosed with MEO between 1987 and 1991.
Clinical and laboratory data review, focusing on diabetic status and Pseudomonas aeruginosa infection.

Main Results:

Nine out of 30 MEO patients (30%) showed no evidence of diabetes.

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Nondiabetic MEO patients presented with severe ear canal pain, closure, granulation tissue, and resistance to treatment.

Pseudomonas aeruginosa was identified as a common pathogen.

Conclusions:

Malignant external otitis should be considered in nondiabetic patients with Pseudomonas aeruginosa ear infections.
Specific clinical signs like severe pain, canal obstruction, and granulation tissue are indicative in nondiabetic MEO cases.