Bilateral inter nuclear ophthalmoplegia is pathognomonic of: (A) Multiple sclerosis, (B) Pontine glioma, (C) Lateral medullary syndrome, (D) Pontine haemorrhage
Answer is A. *Patient with bilateral injury to medial longitudinal fasciculus will have bilateral internuclear ophthalmoplegia . *Multiple sclerosis is the most common cause . Reference Harrison20th edition pg 2456