A healthy 3-year-old boy reports to his mother that he accidentally swallowed a small plastic toy and is brought to the emergency department for evaluation. The mother recalls that the other toys in the playset are all 1 to 2 cm in length and have no sharp edges. On examination, the child appears to be in no distress and is playing in the examination room with his sister. His vital signs are normal. Of the following, the BEST next step is

A healthy 3-year-old boy reports to his mother that he accidentally swallowed a small plastic toy and is brought to the emergency department for evaluation. The mother recalls that the other toys in the playset are all 1 to 2 cm in length and have no sharp edges. On examination, the child appears to be in no distress and is playing in the examination room with his sister. His vital signs are normal. Of the following, the BEST next step is

The Alvarado/MANTRELS rule for diagnosis of acute appendicitis gives 2 points for

A 5-year-old boy presented with obesity, syndactyly, infantile genitalia, and mental retardation. Fundoscopy revealed retinal degeneration, the parents are first cousin. Of the following, the MOST likely cause of his obesity is

Smooth tongue in nutritional deficiency disorders of childhood is usually caused by deficiency of

All the following matchings' between drugs and vitamin and nutrient deficiency states are true EXCEPT