title: t(1;5)(q23;q33) in a patient with high-risk B-lineage acute lymphoblastic leukemia.
abstract: The t(1;5)(q23;q33) is a rare genetic anomaly that was reported previously in two infants with a myeloproliferative disorder and eosinophilia and in one adult patient with acute nonlymphocytic leukemia (ANLL). A 13-year-old boy with high-risk early pre-B acute lymphoblastic leukemia (ALL) who presented to our institution carried the t(1;5)(q23;q33). He had an initial blast count of 230 X 10(9)/L and responded poorly to prednisone. Complete remission (CR) was achieved, and he had a bone marrow (BM) relapse 3 months after despite intensive consolidation therapy. He underwent allogeneic BM transplantation (BMT) from a human leukocyte antigen (HLA)-identical siblings in early relapse with total body irradiation (TBI) and cyclophosphamide conditioning. He had a short second CR with a central nervous system (CNS) relapse on day + 106 after BMT. Two of the previously reported patients also did not respond to chemotherapy. The t(1;5)(q23;q33) appears to be a rare lineage nonspecific anomaly related to hematologic malignancies that are resistant to current therapy.
authors.affiliation: Department of Pediatrics, Universidad Católica, Santiago, Chile.
authors.forename: F
authors.initials: F
authors.lastname: Barriga
authors.forename: P
authors.initials: P
authors.lastname: Bertin
authors.forename: E
authors.initials: E
authors.lastname: Legües
authors.forename: C
authors.initials: C
authors.lastname: Risueño
authors.forename: W
authors.initials: W
authors.lastname: Andrade
authors.forename: E
authors.initials: E
authors.lastname: Cabrera
authors.forename: G
authors.initials: G
authors.lastname: Grebe
mesh_terms: D000293:Adolescent; D002878:Chromosomes, Human, Pair 1; D002895:Chromosomes, Human, Pair 5; D006801:Humans; D008297:Male; D015452:Precursor B-Cell Lymphoblastic Leukemia-Lymphoma / Q000235:genetics*; D054198:Precursor Cell Lymphoblastic Leukemia-Lymphoma / Q000235:genetics*; D014178:Translocation, Genetic