title: [T lymphoma of immature phenotype associated with polycythemia vera].
abstract: A 20-year old patient is presented with generalized lymphadenopathy, splenomegaly, hyperleukocytosis and a bone marrow biopsy showing panmyelosis with predominance of immature granulocytes. Lymph node biopsy showed a histopathological feature that was diagnosed as a chronic granulocytic leukemia in blast crisis. The cell surface phenotype of these blast cells showed predominance of immature CD1+, CD7+ T lymphocytes. The T cell lineage was confirmed by DNA rearrangement studies. In addition, the patient showed erythrocytosis, arterial O2 saturation of 92% and thrombocytosis, characteristics of polycythemia vera. After chemotherapy, the patient relapsed with similar symptoms and lymph node cells of similar immature T phenotype. With a revised diagnosis of immature T cell lymphoma associated to a myeloproliferative disorder and polyglobulia, the patient received a combined treatment of Cyclophosphamide-Adriamycin-Vincristine-VM26-Prednisone. Two months later, the patient relapsed again. He received the first phase of induction of the BFM protocol, with partial clinical remission. Five months later, the patient returned with fever, polyadenopathy and splenomegaly. Lymph node cells showed again immature T cell phenotype. The patient was next treated with the m-BACOD scheme, with no response and progression of the disease and he died few days later due to massive bleeding and cardiorespiratory failure.
authors.affiliation: División Hematología y Anatomía Patológica, Hospital Ramos Mejía, Facultad de Medicina, Universidad de Buenos Aires, Argentina.
authors.forename: A
authors.initials: A
authors.lastname: Kurchan
authors.forename: N
authors.initials: N
authors.lastname: Somoza
authors.forename: H
authors.initials: H
authors.lastname: Pascuccelli
authors.forename: S
authors.initials: S
authors.lastname: Mide
authors.forename: M R
authors.initials: MR
authors.lastname: Padros
authors.forename: J
authors.initials: J
authors.lastname: Santiago
authors.forename: M L
authors.initials: ML
authors.lastname: Satz
authors.forename: L
authors.initials: L
authors.lastname: Fainboim
mesh_terms: D000328:Adult; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D001706:Biopsy; D001752:Blast Crisis; D015321:Gene Rearrangement; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology*; D016399:Lymphoma, T-Cell / Q000150:complications* / Q000188:drug therapy / Q000473:pathology; D008297:Male; D011087:Polycythemia Vera / Q000150:complications* / Q000175:diagnosis
vernacular_title: Linfoma T de fenotipo inmaduro asociado a una policitemia vera.