02-27-2011, 10:54 AM
A 4-year-old boy has a history of frequent respiratory infections and greasy stools. The child is below the normal percentile for weight and height for age. Physical examination shows nasal polyps and coarse inspiratory crackles in both lung fields that clear with coughing. Which of the following laboratory studies is the next step in determining a diagnosis?
A. Chromosome study
B. Nasal smear for eosinophils
C. Serum IgE level
D. Stool culture
E. Sweat chloride test
A. Chromosome study
B. Nasal smear for eosinophils
C. Serum IgE level
D. Stool culture
E. Sweat chloride test