A 43-year-old woman has numbness, weakness, and blurred vision that resolve but then recur. Brain MRI shows plaques. What is the most likely diagnosis?

A 48-year-old man presents with jaundice, elevated liver enzymes, and a history of intravenous drug use. Which viral hepatitis is most likely responsible for his chronic liver disease?

A 60-year-old man presents with fatigue and chronic constipation. He has been on iron supplements for months. Labs reveal microcytic anemia. What is the most likely cause of his anemia?

A 30-year-old woman presents with ptosis and fatigue that worsens throughout the day. Her symptoms improve after rest. What autoantibodies are likely present?

A nurse practitioner observes that a patient recovering from a stroke is unable to comprehend spoken language. Which area of the brain is most likely affected?

A 19-year-old female with asthma presents with worsening wheezing and shortness of breath. What long-term physiologic change contributes to persistent symptoms if uncontrolled?

A patient with Guillain-Barré syndrome develops rapid ascending paralysis. Which complication should be monitored most urgently?

A 67-year-old female presents with persistent diarrhea. She was recently treated with broad-spectrum antibiotics. What is the most likely diagnosis?

A 25-year-old male has polyuria, polydipsia, and dehydration. Serum sodium is high, and urine osmolality is low. What is the most likely diagnosis?

A 59-year-old man presents with hematuria, urgency, and suprapubic pain. Urine cytology is positive for malignant cells. What is the most likely diagnosis?