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American Journal of Neuroradiology 20:287-290 (2 1999)
© 1999 American Society of Neuroradiology

ARTICLE

Mucocele Involving the Anterior Clinoid Process: MR and CT Findings

C. C. Tchoyoson Lima, William P. Dillon,a and Michael W. McDermotta

a From the Department of Diagnostic Imaging, Tan Tock Seng Hospital, Singapore (C.C.T.L.); and the Departments of Radiology (W.P.D.) and Neurological Surgery (M.W.M.), University of California at San Francisco.

Summary: We report two patients with surgically proved mucoceles involving the anterior clinoid process. One patient had a mucocele of an Onodi cell and the other had a mucocele isolated to the anterior clinoid process. The MR signal was increased on both T1- and T2-weighted images in the first patient but was isointense on both sequences in the second patient, a finding that resulted in misdiagnosis. The developmental and anatomic features, as well as the diagnostic pitfalls, are discussed.




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