A 7-Year-Old Boy Is Brought to the Emergency Department Due

A 7-year-old boy is brought to the emergency department due to bloody stools.  The patient first developed colicky abdominal pain 2 days ago, and he had blood in a bowel movement today.  His urine also appeared red.  He has had no diarrhea, vomiting, or dysuria.  The boy has no significant medical history, and his vaccinations are up to date.  Temperature is 37.2 C (99 F) , pulse is 120/min, and respirations are 20/min.  The oropharynx is clear, and the neck is supple.  Cardiopulmonary examination is unremarkable.  The abdomen is diffusely tender with active bowel sounds.  There are raised, purple-red skin lesions along the buttocks and lower extremities.  Which of the following additional findings is most likely present in this patient?

A) Generalized lymphadenopathy
B) Honey-crusted skin rash
C) Injected conjunctivae
D) Joint pain
E) Painful oral ulcers

Correct Answer:

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