Percentages of interphase nuclei meeting type I (grey) and type II (black) criteria for the detection of a t(8;14) by FISH in six controls (C1-C6) and 10 lymphoma/leukemia samples (BL1-BL10). The cutoff levels for type I (dotted line) and type II (black line) criteria were obtained from the statistical evaluation of the controls (mean percentage of false-positive nuclei +3SD).