“…1) Histological studies of the abnormal lesions reveal non-specific inflammation in meninges, compatible with pachymeningitis. 3,4,8,9) Tolosa-Hunt syndrome is considered to represent some of the symptoms of idiopathic cranial pachymeningitis involving the cavernous sinuses and surrounding cranial nerves. 9) The differential diagnosis of Tolosa-Hunt syndrome should include other paracavernous diseases, such as pituitary macroadenoma with cavernous sinus infiltration, paracavernous meningioma, Meckel's cave neurinoma, suprasellar epidermoid tumor, leptomeningeal metastases, granulomatous pachymeningitis sequelae, and aneurysm causing compression of the cavernous sinus.…”