Gastrointestinal Involvement in a Patient with Chronic Lymphocytic Leukemia

A 70-year-old man is admitted to the hospital with symptoms of fatigue and dyspnea. A total blood count shows leukocytosis with an increased lymphocyte count. In a short time, his white blood cell count is dramatically increased and flow cytometry reveals a phenotype that is positive for CD20, CD19, and CD5…