Small lymphocytic lymphoma, light micrograph. B-cell chronic lymphocytic leukemia and small lymphocytic lymphoma are the most common mature B-cell neoplasms and are considered to be different manifestations of the same disease. Chronic lymphocytic leukemia affects middle-aged and elderly patients. The mature-appearing neoplastic B-cells are predominantly in blood and bone marrow. In small lymphocytic lymphoma, the neoplastic cells are mainly extramedullary with very few leukemic cells in blood. In 5% to 10% of patients with chronic lymphocytic leukemia / small lymphocytic lymphoma, the disease undergoes transformation to a more aggressive tumor, usually in the form of a diffuse large B-cell lymphoma, as shown in this image. This phenomenon is known as Richter Syndrome. The prognosis is extremely poor. | |
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