A 73-year-old gentleman presented with progressive weakness over the course of a few months, more prominent in the lower extremities. He denied myalgia, seizures, immobilization, fever, or viral-like illness. His comorbidities were significant for coronary artery disease, hypothyroidism, and hyperlipidemia. Medications included metoprolol, aspirin, thyroxine, and atorvastatin, which was started 4 years prior to presentation. Patient denied any alcohol consumption or illicit drug use.