In addition to thrombocytopenia, WAS patients have abnormally small platelets (i.e. microthrombocytes) and ~30% also have elevated eosinophil counts (i.e. eosinophilia).
Selain trombositopenia, pasien WAS memiliki trombosit kecil abnormal (yaitu mikrothrombosit) dan ~ 30% juga mengalami peningkatan jumlah eosinofil (yaitu eosinofilia).