A Child Has a Recent History of Leg Pain, Unexplained

A child has a recent history of leg pain, unexplained bruising, and nosebleeds. The provider notes petechiae and diffuse lymphadenopathy. A complete blood count reveals a white blood cell (WBC) of 30,000 cells/mm³ and near normal red blood cell (RBC) and platelet counts. What will the provider do next to manage this patient?

A) Order coagulation studies to evaluate for coagulopathies
B) Perform biochemical studies to look for hyperuricemia
C) Refer to a specialist for a bone marrow aspirate and biopsy
D) Repeat the complete blood count in 2 weeks