A 12yo girl presents to the ED in December with fever for 4 days, malaise, and pain in the right thigh gradually leading to her having difficulty walking. There is no history of trauma, although she did play a lot of basketball 1 week ago. She is alert and oriented. Physical exam of her leg is unremarkable except for diffuse pain. She has no rash nor joint swelling or erythema. Her vital signs are: temp 39.1, HR 165, RR 22, BP 85/44. Labs show an elevated WBC count with a bandemia, a BUN of 20 with a creatinine of 2.2, and mildly elevated transaminases with a bilirubin of 2.4.

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Which of the following is true?