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AJNR - American Journal of Neuroradiology

Published ahead of print on October 9, 2007
doi: 10.3174/ajnr.A0820

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Diffusion-Weighted MR Imaging Findings in an Isolated Abscess of the Clivus

J.P. Soares-Fernandes^a, J.M. Valle-Folgueral^a, N. Morais^a, M. Ribeiro^a and J.A. Moreira-da-Costa^a

^a Department of Neuroradiology, Hospital de S. Marcos, Braga, Portugal
^b Department of Neurosurgery, Hospital de S. Marcos, Braga, Portugal

View larger version (57K): [in this window] [in a new window]   Fig 1. A, A 2-mm section of sagittal CT reformation (bone window) shows destruction of the upper clivus and sellar floor. Only slight mucosal thickening is seen in the sphenoid sinus, and its bone walls are intact. B, Sagittal T2-weighted image reveals a moderately expansile cystic lesion with a peripheral low-signal-intensity rim. C, Sagittal postgadolinium T1-weighted image delineates the cystic or necrotic center and thick peripheral enhancement.

View larger version (97K): [in this window] [in a new window]   Fig 2. A, Oblique coronal DWI shows high signal intensity in the center of the clival lesion (white arrow). B, Apparent diffusion coefficient map demonstrates corresponding decreased signal intensity confirming restricted diffusion (black arrow).