A 2-year-old child presents with a peeling, erythematous rash on the hands and feet. The mother reports that he has become ill tempered and refuses to walk about, preferring to lie in bed. Physical examination reveals an irritable, pale child with photophobia. Temperature is 98.5°F, heart rate is 80/minute, and respiratory rate is 23/minute. Tremor of the tongue is evident. Further history and follow-up evaluation reveal that the child's elder brothers have been playing with liquid mercury. Which is the most likely diagnosis?

A 2-year-old child presents with a peeling, erythematous rash on the hands and feet. The mother reports that he has become ill tempered and refuses to walk about, preferring to lie in bed. Physical examination reveals an irritable, pale child with photophobia. Temperature is 98.5°F, heart rate is 80/minute, and respiratory rate is 23/minute. Tremor of the tongue is evident. Further history and follow-up evaluation reveal that the child's elder brothers have been playing with liquid mercury. Which is the most likely diagnosis?

Assume you are evaluating the specificity of the indirect fluorescence antibody test for rapid diagnosis of Campylobacter enteritis. The number of normal persons tested is 150 and the test is positive in 30 persons. The specificity of this test is

A young couple of a 2-month-old baby girl with excessive crying seeks medical advice. The LEAST important advice is to

A 5 years old boy presents with joint swelling after minor trauma, mother gives history of prolonged bleeding from circumcision site. His platelets count is 170000, PT is 10 seconds and APTT is 60 seconds. What is most likely the diagnosis?

Children with anterior mediastinal masses are at serious risk for airway compromise and vascular obstruction. Which of the following is NOT an indication for CT scan in these cases?