Meningiomas are slow-growing, benign tumours that arise from the meninges anywhere in the central nervous system.[1] They are also one of the most common tumours affecting the cavernous sinus.[1] The presenting symptoms depend on the compression of the nearby neurovascular structures. Patients with cavernous sinus tumours most frequently present with diplopia, ophthalmoplegia, ptosis, trigeminal nerve dysfunction, facial numbness or facial pain, visual field defects or ischemic defects due to carotid artery involvement.[2] There are three primary treatment options for patients with cavernous sinus meningiomas: observation, microsurgical resection, and stereotactic radiosurgery.[2] However, treatment planning depends on presenting symptoms, anatomic location of the tumour, size of the tumour, disease progression and recurrence.[2] Herein, we report a case of isolated incomplete pupil involving third cranial nerve palsy as the only presenting feature of cavernous sinus meningioma.

Meningiomas are slow-growing, benign tumours that arise from the meninges anywhere in the central nervous system.[1] They are also one of the most common tumours affecting the cavernous sinus.[1] The presenting symptoms depend on the compression of the nearby neurovascular structures. Patient...