A patient of more than 70 years, presented with generalized lymphadenopathy, WBC count was 20,000/mm3 and blood film showed >70% mature looking lymphocytes. Next investigation that should be done -: (A) LN Biopsy, (B) Peripheral Immunohistophenotyping, (C) Bone marrow aspiration, (D) Peripheral blood cytogenetics
Answer is B. . Peripheral Immunohistophenotyping