A 33-year-old woman comes to the physician for a 2-month history of a worsening, non-productive dry cough and erythematous, non-pruritic skin lesions on her legs. She has a history of type I diabetes mellitus. The immunologic mechanism for this patient’s cutaneous presentation is most similar to which of the following?
Anaphylaxis
Arthus reaction
Contact dermatitis
Pernicious anemia
