RESUMO
Neonatal leukaemia is defined as occurring within the first 28 days of life and most, if not all, cases are congenital. With the exception of Down syndrome-associated transient abnormal myelopoiesis, which is not considered here, neonatal leukaemias are rare. In two-thirds of patients the disease manifests as an acute myeloid leukaemia, frequently with monocytic/monoblastic characteristics. Most other cases are acute lymphoblastic leukaemia, particularly B lineage, but some are mixed phenotype or blastic plasmacytoid dendritic cell neoplasms. The most frequently observed cytogenetic/molecular abnormality is t(4;11)(q21.3;q23.3)/KMT2A-AFF1 followed by t(1;22)(p13.3;q13.1)/RBM15-MKL1 and t(8;16)(p11.2;p13.3)/KAT6A-CREBBP. Common clinical features include prominent hepatosplenomegaly and a high incidence of skin involvement, sometimes in the absence of bone marrow disease. A distinctive feature is the occurrence of spontaneous remission in some cases, particularly in association with t(8;16). In this review, we summarise current knowledge of the clinical, cytogenetic and molecular features of neonatal leukaemia and discuss clinical management of these cases.
Assuntos
Leucemia/congênito , Antineoplásicos/uso terapêutico , Células Dendríticas , Diagnóstico Diferencial , Exantema/congênito , Exantema/genética , Exantema/terapia , Ordem dos Genes/genética , Histona-Lisina N-Metiltransferase/genética , Humanos , Recém-Nascido , Leucemia/genética , Leucemia/terapia , Proteína de Leucina Linfoide-Mieloide/genética , Remissão Espontânea , Resultado do TratamentoAssuntos
Transformação Celular Neoplásica/ultraestrutura , Leucemia Mielogênica Crônica BCR-ABL Positiva/patologia , Megacariócitos/ultraestrutura , Adulto , Transformação Celular Neoplásica/genética , Análise Citogenética , Feminino , Humanos , Hibridização in Situ Fluorescente , Leucemia Mielogênica Crônica BCR-ABL Positiva/genéticaRESUMO
BACKGROUND: This is the first documented case of a patient with hemophagocytic lymphohistiocytosis in association with coeliac disease. There was complete clinical and biochemical remission of hemophagocytic lymphohistiocytosis following the introduction of a gluten-free diet. CASE PRESENTATION: A 7-year-old white girl presented with fevers and maculopapular rash with a recent history of tonsillitis. Blood tests revealed thrombocytopenia (64×109/L), anemia (80 g/L), hypofibrinogenemia (1 g/L), and hyperferritinemia (71,378 µg/L). A bone marrow revealed evidence of hemophagocytosis, but the results of tests for the genetic or familial-associated hemophagocytic lymphohistiocytosis syndromes were negative. The results of screening tests for known secondary causes were negative. She was diagnosed as having hemophagocytic lymphohistiocytosis and following treatment with the hemophagocytic lymphohistiocytosis-2004 protocol these symptoms, in addition to the biochemical and hematological markers, completely resolved. She presented again 10 months later with fever, rash, and biochemical abnormalities suggestive of hemophagocytic lymphohistiocytosis. Her tissue transglutaminase was markedly raised and the results of blood tests revealed a genetic susceptibly to coeliac disease in the form of HLA-DQ2 positivity. She commenced a gluten-free diet and there was complete symptomatic and biochemical response without any further chemotherapy. She had further episodic rashes, each associated with the accidental intake of gluten. CONCLUSIONS: This is to the best of our knowledge the first documented case of hemophagocytic lymphohistiocytosis in association with coeliac disease. No other secondary cause found; she initially responded to chemoimmunotherapy specific for hemophagocytic lymphohistiocytosis but relapsed within a few months of cessation of treatment and then achieved complete remission on gluten withdrawal alone.