Additionally, although the BCR clonotype was not detectable (marked in gray in Figure 5D), C17 from the untreated sample (MC3P1), C14 from the progressed tumor (MC3P2), and C11 from the relapsed tumor (MC3Ri) shared the same chr19 deletion, indicating that they may have originated from the same original clone (Figure 5D). Here, BCR is linked to neoplasm.