RESUMO
Acute undifferentiated leukemia (AUL) is a very rare hematologic neoplasm that expresses no markers specific for either myeloid or lymphoid lineages. While commonly observed in several acute leukemias, KMT2A rearrangements in AUL have been rarely reported in the literature. We report the third case to our knowledge of AUL harboring a KMT2A rearrangement. Furthermore, the KMT2A/GIMAP8 gene fusion identified in this case represents a novel KMT2A rearrangement.
Assuntos
GTP Fosfo-Hidrolases/genética , Histona-Lisina N-Metiltransferase/genética , Leucemia Aguda Bifenotípica/genética , Proteína de Leucina Linfoide-Mieloide/genética , Proteínas de Fusão Oncogênica/genética , Criança , Humanos , Leucemia Aguda Bifenotípica/patologia , MasculinoRESUMO
Immune thrombocytopenia (ITP) in children is a relatively uncommon and generally benign condition presenting as abrupt onset of bruising, petechiae and thrombocytopenia in an otherwise healthy child due to production of anti-platelet autoantibodies. Diagnosis is largely clinical and laboratory investigation should be kept to a minimum. Indications for treatment have not been standardized and include bleeding, parental anxiety and quality of life. Multiple treatments are available that have been proven to increase the platelet count; the most commonly employed include IVIG, steroids and WinRho (anti-D). Intracranial hemorrhage is the most serious potential complication but is extremely rare and splenectomy is reserved for chronically symptomatic patients who have not responded to other modalities. Identification of molecular targets may be a promising avenue for future research.
