Type, frequency, and number of lesions detected by MC and SNP-A. (A) The frequency of chromosomal aberrations and noninformative results as detected by both MC and SNP-A. The insert in the SNP-A pie chart shows the portion of acquired UPD, either as the sole change or in addition to other abnormalities. (B) The percentage of patients with 0, 1, 2-3, and more than 3 lesions, respectively, as detected by MC (■) and SNP-A (□). Pie charts demonstrate distribution of low versus advanced stage of MDS within noninformative and normal karyotypes detected by MC and SNP-A.