Which one of the following laboratory test differentiates leukamoid reaction from chronic myeloid leukemia?: (A) LAP (leukocyte alkaline phosphatase), (B) LCA (leukocyte common antigen), (C) MPO (myelo-peroxidase), (D) TRPA (tartrate resistant alkaline phosphatas
Answer is A. Ans. is 'a' i.e., LAP (leukocyte alkaline phosphatase) o A leukemoid reaction is an exuberant form of ieucocytosiswith leucocyte count upto 50000/mm3, that may follow infections.It is difficult to distinguish leukemoid reaction from leukemia.Absence of Philadelphia chromosome and increase in leucocyte alkaline phosphatase score rules out CML. CMLLeukemoidpH chromosome+ve-veALPDecreasedIncreased