Objectives: Determine the role of 99m technetium scintigraphy for diagnosis in progressive necrotizing external otitis and assess the diagnostic criteria of this disease.
Method: A retrospective study was conducted in 16 patients hospitalized for suspected progressive necrotizing external otitis. Patient characteristics, clinical features, imaging findings and disease course were recorded in order to evaluate the classical criteria of diagnosis.
Results: The clinical course and complementary test results showed that 99m technetium scintigraphy lacked specificity for progressive necrotizing external otitis. These findings are in disagreement with those reported in the literature.
Conclusion: Patient characteristics and clinical course are key elements for early diagnosis of this disease. Scintigraphy findings are contributive only when bone lysis (which occurs late) can be evidenced. A prospective study would be required to confirm the lack of specificity of scintigraphy in progressive necrotizing external otitis.
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