TP53 and B-cell chronic lymphocytic leukemia: This group (black, “not CLL” in Table 4) was notable for a lower percentage of cases with a deletion of chromosome 13q, but a high percentage of cases with deletion 17p (TP53) (24% vs. 8%, p = 0.006) and chromosome 9 (10% vs. 2%, p = 0.003).