RT Journal Article SR Electronic T1 Mucocele Involving the Anterior Clinoid Process: MR and CT Findings JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 287 OP 290 VO 20 IS 2 A1 Tchoyoson Lim, C. C. A1 Dillon, William P. A1 McDermott, Michael W. YR 1999 UL http://www.ajnr.org/content/20/2/287.abstract AB 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.