Intracranial mycotic aneurysm associated with transsphenoidal surgery to the pituitary adenoma

Abstract A case is reported in which a mycotic aneurysm of the supraclinoidal portion of the internal carotid artery formed as the result of suprasellar infection following transsphenoidal surgery. The source of infection was thought to be a maxillary sinusitis. The aneurysm was treated with systemic antibiotic therapy and disappeared 4 months after the operation. Repeated angiography showed the whole course from the formation to the disappearance of the aneurysm and was valuable in the treatment of intracranial mycotic aneurysms.