A 6-year-old girl presented to her pediatrician with her par…
A 6-year-old girl presented to her pediatrician with her parents with a chief complaint of easy bruising, nosebleeds, and petechiae. At 1 year of age, she experienced her first episode of epistaxis and has had several episodes since. There have been no significant infections and she has never traveled outside of the US. The family history is unremarkable. Patient Results Reference Interval WBC 2.9 4.5-11.0 x 10^9/L RBC 2.24 4.3-5. x 10^12/L HGB 6.5 g/dL HCT 18.7 39-55% MCV 84.9 80-11 fL MCH 29.0 25.4-34.6 pg MCHC 34.7 31-37 g/dL RDW 15.3 11.5-14.5 % PLT 6 150-400 x 10^9/L What is the differential diagnosis?