A 60 year old man with optic disc swelling in the right eye and optic atrophy in left eye optic atrophy most likely has

This is a case of pseudo foster Kennedy syndrome.- It is characterized by occurrence of unilateral papilloedema associated with raised intracranial pressure (due to any cause) and a pre-existing optic atrophy (due to any cause) on the other side. It is caused most commonly by bilateral sequential anterior ischemic optic neuropathy. Foster-Kennedy syndrome.- It is associated with olfactory or sphenoidal meningioma and frontal lobe tumors (anterior fossa tumours) In this condition, there occurs pressure optic atrophy on the side of lesion and papilloedema on the other side (due to raised intracranial pressure). It is classically associated with frontal lobe meningioma which is absent in above case. Sphenoid wing meningiomas are common in 5th decade of life in women whereas the clinical scenario provided is of 60 year old male patient