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AJNR - American Journal of Neuroradiology

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Diffusion-Weighted Imaging for Differentiating Recurrent Cholesteatoma from Granulation Tissue after Mastoidectomy: Case Report

Sharad Maheshwari^a and Suresh K. Mukherji^a

^a From the Department of Radiology, University of Michigan Health System, Ann Arbor, MI

View larger version (162K): [in a new window]   FIG 1. Axial view CT scan shows soft tissue (arrow) filling the postoperative mastoidectomy bowl and extending medially to the middle ear cavity.

View larger version (167K): [in a new window]   FIG 2. Axial view T2-weighted MR image shows the soft tissue to be of high T2 signal (M).

View larger version (163K): [in a new window]   FIG 3. Axial view contrast-enhanced T1-weighted MR image shows the mass to be of intermediate signal with a thin rim of peripheral enhancement (arrow). T1- and T2-weighted findings are strongly indicative of cholesteatoma.

View larger version (142K): [in a new window]   FIG 4. Diffusion-weighted image shows increased signal intensity in the middle ear cavity mass (1). Outline indicates where the apparent diffusion coefficient values were obtained.