Kawasaki disease — MCQs

A 4-year-old male is brought to the pediatrician for a low-grade fever. His mother states that he has had a waxing and waning fever for the past 6 days with temperatures ranging from 99.8°F (37.7°C) to 101.0°F (38.3°C). She reports that he had a similar episode three months ago. She also reports symmetric joint swelling in the child’s knees and wrists that has become increasingly noticeable over the past 8 weeks. He has not had a cough, difficulty breathing, or change in his bowel movements. The child was born at 40 weeks gestation. His height and weight are in the 45th and 40th percentiles, respectively. He takes no medications. His temperature is 100.1°F (37.8°C), blood pressure is 100/65 mmHg, pulse is 105/min, and respirations are 18/min. On examination, there is a non-pruritic, macular, salmon-colored truncal rash. Serological examination reveals the following: Serum: Rheumatoid factor: Negative Anti-nuclear antibody: Negative Anti-double stranded DNA: Negative Anti-SSA: Negative Anti-SSB: Negative Human leukocyte antigen B27: Positive Erythrocyte sedimentation rate: 30 mm/h This patient is most likely at increased risk of developing which of the following?

A 4-year-old presents with fever, rash, and red, cracked lips. Physical exam reveals cervical lymphadenopathy. Which of the following disease processes is most likely?

A 3-year-old boy is taken to the ER by his parents due to his elevated temperature. He has had a fever (>101.1 deg F) for a little over a week, and over that time, his parents noticed his eyes had gotten a little pink, and his palms and soles were red and swollen. His lips and tongue are also peeling. His parents note he has not taken any new medications, and they did not notice any runny nose, sore throat, cough, or changes in his bowel or bladder habits. In the ER, his vitals are as follows: temperature is 101.3 deg F (38.5 deg C), blood pressure is 90/60 mmHg, pulse is 125/min, and respirations are 20/min. His exam is notable for bilateral injected conjunctivae, right-sided cervical lymphadenopathy, erythematous and edematous palms and soles, and erythema multiforme-like rash over his trunk. Appropriate lab tests and imaging were performed. Which of the following is the most worrisome complication of this boy's disease process?