06-14-2010, 10:46 PM
A 32-year-old woman comes to the physician because of¨a 4-month history of fatigue, cough, and shortness of breath with¨exertion. She has had two episodes of pneumonia and one episode of severe¨sinusitis over the past 2 years. She has never smoked. She takes no¨medications. Crackles are heard at the left lung base. An x-ray¨film of the chest shows a left lower lobe infiltrate and scarring of the right¨base.¨
For each patient with cough, select the most¨appropriate next step in ¨diagnosis.¨
¨A) Measurement of serum a1-antitrypsin level¨
¨B) Methacholine challenge test¨¨
C) Quantitative measurement of serum antibody levels¨
¨D) Sweat chloride test¨
¨E) Ventilation-perfusion lung scans¨
i thought a or d. but she is old. and key says C???!!! How so? IgA deficieny??
For each patient with cough, select the most¨appropriate next step in ¨diagnosis.¨
¨A) Measurement of serum a1-antitrypsin level¨
¨B) Methacholine challenge test¨¨
C) Quantitative measurement of serum antibody levels¨
¨D) Sweat chloride test¨
¨E) Ventilation-perfusion lung scans¨
i thought a or d. but she is old. and key says C???!!! How so? IgA deficieny??