trigeminal neuralgia No evidence of acute ischemic or hemorrhagic lesion on this scan.About 7mm x 8mm sized fluid filled left petrous apex lesion, diagnostic possibilities are most likely benign lesions such as petrous apex effusion, asymmetric petrous pneumatization, unlikely to be other lesions such as petrous apicitis, mucocele or tumorous conditions.The ventricles, sulci and cisterns are symmetric and unremarkable. The gray-white matter differentiation is normal. There is no mass, mass effect, edema, midline shift, intra or extra-axial fluid collection/hemorrhage, or restricted diffusion/acute ischemia. The midline structures and cranial-cervical junction are normal. Normal flow voids are identified in the major intracranial vessels. The paranasal sinuses and mastoid air cells are clear.
No evidence of acute ischemic or hemorrhagic lesion on this scan.Benign petrous apex, left, most likely as described above.