A 7-year-old boy is brought to the emergency department by his parents for arthralgias. He had a cough and runny nose last week but otherwise has been in good health. Temperature is 37 C (98.6 F), blood pressure is 95/65 mm Hg, pulse is 92/min, and respirations are 20/min. Physical examination shows raised, red-purple papules, some of which have coalesced, over the patient's buttocks and thighs. Auscultation of the lungs and heart is normal. The abdomen is soft with normal bowel sounds. The knees are tender but do not appear warm or swollen. Urinalysis results are as follows: Which of the following mechanisms is the most likely underlying cause of this patient's renal findings?

Question

A 7-year-old boy is brought to the emergency department by his parents for arthralgias.  He had a cough and runny nose last week but otherwise has been in good health.  Temperature is 37 C (98.6 F), blood pressure is 95/65 mm Hg, pulse is 92/min, and respirations are 20/min.  Physical examination shows raised, red-purple papules, some of which have coalesced, over the patient's buttocks and thighs.  Auscultation of the lungs and heart is normal.  The abdomen is soft with normal bowel sounds.  The knees are tender but do not appear warm or swollen.  Urinalysis results are as follows:  Which of the following mechanisms is the most likely underlying cause of this patient's renal findings?

Quizplus · Accepted Answer

The Answer is C

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