In another immunohistochemistry study, SAP tested negative in all cases of lymphoblastic B-NHL (0 positive cases out of 11), CLL (0/20), MCL (0/20), FL grade 1, 2, and 3 (0/114), Burkitt lymphoma (0/14), nodal and splenic MZL (0/23), MALT (0/12), and HCL (0/1). The gene discussed is SH2D1A; the disease is B-cell chronic lymphocytic leukemia.