A 3-year-old manifests the sudden onset of drooling and coughing. He is anxious and refuses to eat. His voice is normal, and his lung examination results also are normal. The most likely diagnosis is

A 3-year-old manifests the sudden onset of drooling and coughing. He is anxious and refuses to eat. His voice is normal, and his lung examination results also are normal. The most likely diagnosis is

A 9-year-old white male presents with a 3-month history of epigastric abdominal pain that is intermittent, aching, and lasts for 10-15 minutes. Pain is also present at night. Stool examination for occult blood is positive. The most likely diagnosis is

All of the following metabolic disorders can cause constipation EXCEPT

Periodontitis is often associated with the following conditions EXCEPT

Acute diarrhea in infancy is commonly caused by