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AJNR - American Journal of Neuroradiology

Published ahead of print on February 26, 2009
doi: 10.3174/ajnr.A1473

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American Journal of Neuroradiology 30:1123-1126, June-July 2009
© 2009 American Society of Neuroradiology

Technical Note
HEAD & NECK

Apparent Diffusion Coefficient Values of Middle Ear Cholesteatoma Differ from Abscess and Cholesteatoma Admixed Infection

S. Thiriat^a, S. Riehm^b, S. Kremer^b, E. Martin^c and F. Veillon^b

^a Department of Radiology, Hautepierre Strasbourg, Strasbourg, France
^b Department of Radiology, Hautepierre Strasbourg, Hôpital de Hautepierre, Cedex, France
^c Department of Otolaryngology, Hautepierre Strasbourg, Hôpital de Hautepierre, Cedex, France

Please address correspondence to Sébastien Thiriat, CHU, Radiology, Moliere St, Strasbourg, 67098, France; e-mail: sebastienthiriat{at}voila.fr

SUMMARY: A retrospective study was conducted on a cohort of 15 patients who underwent surgery because cholesteatoma or abscess was suspected. All patients had MR imaging prior to surgery with diffusion-weighted images (DWI) from which the apparent diffusion coefficient (ADC) value was calculated. Using this technique, we were able to determine 3 distinct ADC value ranges corresponding to the 3 groups of lesions found at surgery (pure cholesteatoma, cholesteatoma with infection, and abscess or infection). This needs to be confirmed by further studies with a wider range of patients.