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A 4-year-old boy presents with fever, limp, and hip pain. Hip x-ray is normal, but ESR is elevated. Most likely diagnosis is:
- A. Septic arthritis
- B. Transient synovitis
- C. Osteomyelitis
- D. Slipped capital femoral epiphysis
Correct Answer: B
Rationale: Transient synovitis is common in preschoolers with limp and fever, often post-viral, with normal x-ray, per AAP. A, C-E have different presentations or imaging.
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Body mass index (BMI) should be calculated starting at age:
- A. 6 months
- B. 1 year
- C. 2 years
- D. 3 years
Correct Answer: C
Rationale: BMI screening starts at age 2 , per AAP, as it aligns with standardized growth charts. Earlier ages (A, B) use weight-for-length, and later starts (D, E) delay assessment.
Which drug will you prepare for a child with convulsions in the ER?
- A. Ampicillin
- B. Chloroquine
- C. Hydrocortisone
- D. Phenobarbital
Correct Answer: D
Rationale: Phenobarbital D is the anticonvulsant for seizures, per document 6.
A 2-year-old boy presents with fever and a stiff neck. CSF analysis shows gram-positive cocci. Most likely diagnosis is:
- A. Viral meningitis
- B. Streptococcus pneumoniae meningitis
- C. Haemophilus influenzae meningitis
- D. Neisseria meningitidis meningitis
Correct Answer: B
Rationale: S. pneumoniae meningitis is a common cause of bacterial meningitis with gram-positive cocci in CSF, per AAP. A, C-E differ in etiology or CSF findings.
Vitamin B1 deficiency causes
- A. Beriberi
- B. Mumps
- C. Pellagra
- D. Scurvy
Correct Answer: A
Rationale: Beriberi A results from B1 deficiency, per document p14, 8.
A 4-year-old girl presents with fever and conjunctivitis. Exam shows a rash and swollen hands. Most likely diagnosis is:
- A. Measles
- B. Kawasaki disease
- C. Scarlet fever
- D. Rubella
Correct Answer: B
Rationale: Kawasaki disease includes fever, conjunctivitis, rash, and swollen hands, per AHA. A, C-E differ.