A homeless patient visits the clinic for the first time for a routine physical. He does not have any complaints and is not aware of previous medical history. On exam, you note numerous cuts on his...

A homeless patient visits the clinic for the first time for a routine physical. He does not have any complaints and is not aware of previous medical history. On exam, you note numerous cuts on his feet and markedly reduced sensation to pain and light touch up to the ankles and wrists bilaterally. The scent of alcohol is noticeable on his breath. His neurologic exam is otherwise intact. What is the most likely diagnosis?

A. Peripheral neuropathy

B. Subacute combined systems degeneration

C. Syringomyelia

D. Tabes dorsalis

E. Multiple sclerosis