Monoclonal B-cell lymphocytosis☆

color antibody-fluorochrome combinations or four to eightcolor antibody-fluorochrome combinations). Furthermore, itis well established that the prevalence increases with age. In arecent study in Spain, 608 healthy individuals were evaluatedwith an eight-color antibody panel. The overall prevalence ofMBL was 14%; it was around 5% in under 60-year-old indi-viduals, 17.5% in individuals between 60 and 69 years old,and reached 75% in ages >89 years.