<prompt> The type of non hodgkins lymphoma with highest rate of gastrointestinal system involvement is:B cell chronic lymphocytic leukemiaMantle cell lymphomaExtranodal marginal zone B cell lymphoma of MALT typeFollicular lymphoma  <response>: Disease Median Age, years B Symptoms, Bone Marrow Involvement, Gastrointestinal Tract Involvement, B cell chronic lymphocytic leukemia 65 33 72 3 Mantle cell lymphoma 63 28 64 9 Extranodal marginal zone B cell lymphoma of MALT type 60 19 14 50 Follicular lymphoma 59 28 42 4 Ref: Harrison, E-18,P-925 