Rare Case of Delayed Relapse of Bilateral Malignant Otitis Externa in a Diabetic Patient, a report
A recent case report details a rare, life-threatening case of bilateral malignant otitis externa in a diabetic patient, which was complicated by meningitis and cranial nerve palsies that unexpectedly emerged months after the initial infection had cleared. This aggressive relapse underscores the critical need for strict glycemic control, prolonged antibiotic therapy, and extended clinical vigilance to prevent devastating neurological complications.
These findings of the case report are published in the Indian Journal of Otology in May 2026 by Dr. Vadisha Bhat and an expert clinical team from the Department of Otorhinolaryngology at KS Hegde Medical Academy in Mangalore, India.
The exceptional case emphasizes that medical practitioners must maintain a continuously high index of clinical suspicion because the early signs of the dangerous condition frequently mimic simple, benign ear infections before rapidly escalating. Recognizing the immediate potential for devastating, delayed intracranial extensions and progressive neurological complications is absolutely essential for guiding aggressive medical intervention and ultimately improving patient survival rates.
A septuagenarian diabetic male initially presented with right-sided purulent otorrhea and severe pain, prompting urgent high-resolution computed tomography and magnetic resonance imaging that confirmed extensive skull base osteomyelitis, which was then successfully managed with a prolonged six-week course of intravenous meropenem and strict insulin therapy. Remarkably, six months after achieving complete asymptomatic remission, the patient developed new severe left ear pain, aspiration symptoms, and left vocal cord paralysis, establishing a confirmed diagnosis of nonsynchronous bilateral disease that ultimately resolved following a second intensive six-week antibiotic regimen and dedicated multidisciplinary rehabilitation.
Mechanistically, chronic poor glycemic control severely compromises the innate host immune response, providing an optimal biological environment for Pseudomonas aeruginosa to aggressively deploy destructive virulence factors, including robust biofilm formation and elastase production, within the external auditory canal. These specific bacterial mechanisms actively facilitate rapid tissue invasion, allowing the unchecked infection to extend deep into the surrounding temporal bone, adjacent temporomandibular joint, and delicate cranial nerves.
The critical report directly informs contemporary clinical practice by conclusively demonstrating that the infection acts as a severe systemic illness requiring exhaustive long-term patient follow-up, continuous radiological monitoring, and rigorous metabolic management. These findings urgently warn clinicians that severe neurological complications and unexpected contralateral relapses can emerge months after apparent resolution, thereby necessitating a highly coordinated multidisciplinary team approach for successful long-term care.
Reference
Bhat V, Nambiar AP, Jayakumar DS, Tejaswi V, Chandy AG. Malignant otitis externa – A nonsynchronous bilateral case with transient multiple cranial nerve palsies. Indian J Otol 2026;32:185‑9.
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