A 62-year-old woman with chronic hepatitis C presents to the physician for a 2-week history of discoloration of her lower extremities. Laboratory studies show decreased serum complement protein C4. A photograph of the patient’s legs is shown.
The pathophysiology of this patient’s acute presentation is most similar to which of the following?
Anaphylaxis
Arthus reaction
Contact dermatitis
Graft-versus-host disease
Heparin-induced thrombocytopenia
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Cut-to-the-chase Answer (0:35):
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HY USMLE Answer (7:42):
