Publication date: December 2020
Source: International Journal of Pediatric Otorhinolaryngology, Volume 139
Author(s): Rémi Hervochon, Monique Elmaleh-Berges, Martine Francois, Alix Marhic, Abdullah Bahakim, Natacha Teissier, Thierry Van Den Abbeele
Abstract
Objectives
The aims of this study were first to calculate the Positive Predictive Value (PPV) of DW-MRI to detect cholesteatoma and then to analyze false positives.
Methods
All temporal bone MRI with DWI sequences performed in our pediatric university hospital between 2005 and 2015 were included retrospectively. 46 patients with a cholesteatoma diagnosis on the MRI report and who underwent surgery were studied.
Results
The number of DW-MRI for identification of cholesteatoma has grown in ten years. We calculated an 89% Positive Predictive Value. DW-MRI sensitivities were 100.0% and 70.7% for respectively keratin and squamous epithelium.
Conclusion
DW-MRI hypersignal is not synonymous of cholesteatoma diagnosis. Indeed, this diagnosis relies on the importance of a proper otoscopic examination, a suggestive medical history, CT scan data and analysis of other MRI sequences, including T1-weighted sequence, to rule out other etiologies of middle ear DW-MRI hypersignal.
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