International Working Group has enunciated criteria for defining a remission for AML
Some patients may fulfill all of the above criteria for CR but may not recover normal peripheral blood counts. These are denoted as CRi, or CR with insufficient hematological recovery (platelets or neutrophils). CRp describes a subset of patients with CRi, wherein patients fulfill all criteria for CR except that platelet counts are <100,000/microL. Lack of full recovery of counts is of significant concern as it may presage relapse.The survival and relapse rates for patients with CRp appear to be worse than those with a CR, but better than those with a partial remission (PR).
Read the Layperson version here.