6th February 2024

A 73-year-old male was admitted to the hospital with confusion and unsteadiness on his feet.

A 73-year-old male was admitted to the hospital with confusion and unsteadiness on his feet. He was admitted to the hospital two months ago with SMA occlusion and required extensive small bowel resection, leaving only 120cm of small bowel remaining. His wife states that he was initially recovering but had become increasingly confused over the past 3 weeks. 

He has a broad-based gait. Bilateral horizontal nystagmus was noted. He is disorientated to time and place. His wife denies that he was a heavy alcohol drinker.

What is the underlying cause of his diagnosis?