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 42-year-old woman is brought to the emergency department because of two episodes of hemoptysis over the past 24 hours. The patient has a 6-month history of severe sinusitis and bloody nasal discharge. Her vital parameters are as follows: blood pressure, 155/75 mm Hg; pulse, 75/min; respiratory rate, 14/min; and temperature, 37.9°C (100.2°F). Examination reveals red conjunctiva, and an ulcer on the nasal septum. Pulmonary auscultation indicates diffuse rhonchi. Cardiac and abdominal examinations reveal no abnormalities. Laboratory studies show:
Urine
Blood 3+
Protein 2+
RBC 10-15/hpf with dysmorphic features
RBC cast numerous
Based on these findings, this patient is most likely to carry which of the following antibodies?
assistant
Antiproteinase 3 antineutrophil cytoplasmic antibody