<prompt> CLL is differentiated from Mantle Cell Lymphoma byCD 5CD 17CD22CD 23  <response>: Mantle cell lymphoma MCL and chronic lymphocytic leukemiasmall lymphocytic lymphoma CLLSLL share many morphologic and immunophenotypic features. In addition to histomorphologic examination, it is customary to use the absence of CD23 to differentiate MCL from CLLSLL. ref - Harrisons internal medicine 20thediton pg764-767 