Anterior Clinoid Process Mucocele: A Case Presenting with Sudden Vision Loss

Mucoceles are benign encapsulated lesions filled with mucus located in parasinuscavities. The occurrence rate of the anterior clinoid process is varying significantly in different studies. Visual disturbances, diplopia, and retrobulbar pain are among the common manifestations of anterior clinoid process mucocele. To our knowledge, 17cases of Anterior clinoid process mucocele with visual involvements have previously been reported.

We aim to report a rare case of a middle-aged man with a large sphenoid mucocele admitted due to the loss of vision in his left eye.

A 46-year-old man with a sudden vision loss inhis left eye was admitted to Loghman Hakim Hospital. In physical examination positive relative afferent pupillary defect(RAPD) was evident. The visual acuityof his right eye was normal, while his left eye had no light perception. Moreover, his visual field was normal onthe right side. He had no other medical complaints.

Clinoid mucocelescausing cranial neuropathy are extremely rare. The proper diagnosis and prompt treatment arenecessary to avoid permanent complications. With proper surgical intervention, recurrence of the mucoceles can be avoided.