Foster Kennedy Syndrome

Foster Kennedy Syndrome is one-sided optic atrophy with contralateral optic disc swelling. It is typically due to a frontal lobe tumor (usually an olfactory groove meningioma) which compresses the ipsilateral optic nerve causing its atrophy and also raises the intracranial pressure leading to contralateral papilledema. The patient may present with anosmia and frontal lobe signs alongside the visual symptoms (central scotoma).

In the absence of intracranial mass, the above mentioned findings are named pseudo- Foster Kennedy Syndrome. It is classically due to bilateral sequential optic neuritis/ischemic optic neuropathy