<prompt> Laboratory evaluation for the differential diagnosis of chronic myeloproliferative disorders includes at thefollowingexcept.Chromosomal evaluationBone marrow aspirationFlow-cytometric analysisDetermination of red blood cell mass  <response>: In chronic myeloproliferative disorder, chromosomal evaluation is needed to identify Philadelphia chromosomeCML trisomy 20polycythemia vera. Bone marrow examination reveals hypercellularity with myeloid predominance in CML erythroid hyperplasia in PV hyperdiploid megakaryocytes in essential thrombocytopenia. Red cell mass will be increased in PV.Reference :Harsh mohan textbook of pathology sixth edition pg no 358. 