A 2-month-old infant presents with poor weight gain, a persistent cough, and frequent bulky, greasy stools. Upon examination, the child also has nasal polyps. What are the potential diagnoses, and what are the next steps?
This child's symptoms are suggestive of cystic fibrosis (CF), a genetic disorder that affects the lungs and digestive system. The greasy stools suggest malabsorption due to pancreatic insufficiency, while the persistent cough indicates pulmonary involvement. The next steps would be to confirm the diagnosis with a sweat chloride test, which is the gold standard for diagnosing CF. If the diagnosis is confirmed, management would involve a multidisciplinary approach including respiratory therapies, pancreatic enzyme replacement, and nutritional support.