<prompt> All of the following statements about hairy cell leukemia are true except:Splenomegaly is conspicuousResults from an expansion of neoplastic T-lymphocytesCells are positive for Taarate Resistant Acid phosphataseThe cells express CD25 consistently  <response>: Hairy cell leukemia is a type of B-cell leukemia. Clinical feature: Massive splenomegaly Increase chances of infections DIAGNOSIS 1. BLOOD Pancytopenia Phase contrast microscopy- Hairy projections Staining- TRAP 2. Immunophenotyping CD11 CD25 CD103 Annexin A1 Best marker 3.BM examination BM aspiration - Dry tap BM biopsy- Honey comb appearance - Fried egg appearance 