MRCP2-2030

A 38-year-old man presents to the emergency department with bleeding from hair follicles on his head. He has also been experiencing a loss of appetite and weight loss. The patient is currently homeless after being laid off from his job a year ago. He consumes 30-units of hard liquor per week and is alcohol dependent. However, he is not confused.

The patient has a medical history of tuberculosis, which he completed treatment for six months ago. The treatment ended two months ago. Upon examination, the patient appears disheveled with poor oral hygiene and gingivitis. He has global muscle weakness rated at 4+/5 on the MRC scale, but there is no sensory impairment. What is the most probable diagnosis?