system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 29-year-old African American woman presents with incidentally noted bilateral hilar lymphadenopathy on a recent chest radiograph for the evaluation of pneumonia 1 month earlier. Upon questioning, she reports a cough, dyspnea, and angina. The report provided by a previous ophthalmologic consultation did not demonstrate any eye abnormalities. Clinical laboratory pathologic analysis reveals an elevated level of angiotensin-converting enzyme. Her physical examination reveals no obvious abnormalities. Her vital signs show a heart rate of 76/min, respiratory rate of 16/min, and blood pressure of 123/73 mm Hg. Of the following options, which is the mechanism of the reaction causing hilar adenopathy in this patient?
assistant
Type IV–cell-mediated (delayed) hypersensitivity reaction