A cryptic chromosome rearrangement, t (5;14)(q35.1;q32.2) was recently identified in a pediatric patient with acute lymphoblastic leukemia (ALL)[31-34], T/myeloid acute bilineal leukemia[35], and a pediatric T-ALL cell line (HPB-ALL); the rearrangement of which targets activation in HOX11L2/TLX3 at 5q35.1 through juxtaposition with a downstream region of BCL11B at 14q32.2[36]. Here, BCL11B is linked to acute lymphoblastic leukemia.