Answer by
soothsayer (500)
Lymhoproliferative disorders will give a typical blood picture of markedly elevated lymphocyte count with decrease in all other cell lineages like neutrophil,monocytes,,platelets,erythrocytes etc. Immunohistochemical studies will confirm presence or absence of lymphoma. Other causes of raised lymphocytes like tuberculosis should also be ruled out[neutrophils and monocytes are usually normal here].