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@Patient999 thanks for your questions.first of all, WBC and SED ( I assume it's ESR) are non specific markers of cancer in general (unless for certain type of leukaemia). Doctors don't use WBC or ESR to diagnose or provide prognosis of cancer patients.
Neither is white cell types used to assess cancer progression during treatment . 
Finally fasting does not affect ESR.
Dr. John H
space doctor