Radiodiagnostics of necrotizing otitis externa

DOI: https://doi.org/10.25512/DIR.2015.09.4.03

For quoting:
Stepanova E.A., Vishnyakova M.V., Zolotova A.V., Egorov V.I., Abramenko A.S. "Radiodiagnostics of necrotizing otitis externa". Journal Diagnostic & interventional radiology. 2015; 9(4); 20-25.

authors:

Stepanova E.A.

Vishnyakova M.V.

Zolotova A.V.

Egorov V.I.

Abramenko A.S.

keywords:

computed tomography

magnetic resonance imaging

мalignant otitis externa

skull base

Abstract:

Malignant otitis externa is a rare but potentially fatal disease, that occurs mostly among elderly diabetic or immunocompromised patients.

Aim: was is to report the experience of the diagnosis of malignant otitis externa.

Materials and methods: we examined 5 patients with diagnosed malignant otitis externa with the help of computed tomography (CT) and magnetic resonance imaging (MRI). In both diagnostic methods, contrast enhancement was used.

Results: causative pathogen is mainly Pseudomonas Aeruginosa. The disease spreads rapidly to skull base region, inducting osteomyelitis and involving the cranial nerves. The diagnosis is based on the radiology methods, anamnesis, and biopsy

Conclusions: CT is a first-line method, which allows to detect the presence of bone erosion, which is critical for the diagnosis. Exact borders of a pathological infiltration, distribution on cranial nerves, brain covers and in a skull were defined on MRI.

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