title: Childhood monosomy 7 syndrome.
abstract: In recent years, chromosomal aberrations in various hematologic disorders have raised a great deal of interest. In fact, several nonrandom chromosomal abnormalities are now recognized to be responsible for a specific type of dyshemopoiesis while others are closely associated with characteristic hematologic features. Monosomy C, later shown to be monosomy 7 by different banding methods, has been described in children in relation to a peculiar myeloproliferative disorder. Retrospective analysis of early cases published in the literature and a recent observation that we wish to report suggest that the most consistent phenotypic expression of monosomy 7 is an increased susceptibility to bacterial infections related to a preleukemic dyshemopoiesis. Acute nonlymphocytic leukemia is the terminal event of this peculiar preleukemic syndrome, and thus suggests that monosomy 7 involves a stem cell already committed to myeloid differentiation.
mesh_terms: D000741:Anemia, Aplastic / Q000097:blood / Q000175:diagnosis; D001853:Bone Marrow / Q000473:pathology; D002675:Child, Preschool; D002869:Chromosome Aberrations / Q000097:blood / Q000175:diagnosis*; D025063:Chromosome Disorders; D002906:Chromosomes, Human, 6-12 and X; D006801:Humans; D007621:Karyotyping; D007945:Leukemia, Lymphoid / Q000097:blood / Q000175:diagnosis; D008297:Male; D011289:Preleukemia / Q000097:blood / Q000175:diagnosis; D013577:Syndrome