Distribution of chromosomal abnormalities detected in 34 patients with B-PLL with 3 cytogenetic subgroups of patients: MYC translocation, MYC gain, and no MYC aberration. Each column represents 1 patient, and each row 1 particular genetic or laboratory parameter. Color code: black or blue, presence; gray, absence; white, not available. CK, ≥3 chromosomal abnormalities; HCK, ≥5 chromosomal abnormalities. The percentages of prolymphocytes (indicated in black boxes) correspond to above-median values, relative to the cohort as a whole.