Paracentric inversion of chromosome 12 in myelodysplasia.
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A 72-year-old male who was admitted to our hospital with severe anemia was diagnosed as refractory anemia with ring sideroblasts (RARS), according to the French-American-British (FAB) classification of myelodysplastic syndromes (MDS). The patient showed persistent eosinophilia with no definite signs of either allergy or a parasitic infection. Chromosomal analysis of bone marrow cells revealed inv(16)(p13q22), a known characteristic of M4Eo acute myeloid leukemia (AML) in the FAB classification. This patient didn't exhibit leukemic transformation during his 20-month clinical course, nor was any found at autopsy. Therefore, this is the first case of RARS to speculate that the chromosomal characteristic inv(16)(p13q22) might be specific for eosinophilia rather than AML.
We describe a 6 1/2-year-old girl with the cardio-facio-cutaneous (CFC) syndrome. She presents with most of the characteristics of this condition: typical facial changes, congenital heart defect, slow growth, ectodermal dysplasia, and developmental delay. Chromosome analysis disclosed a 46,XX,inv(7)(q21.2q31.2) mat karyotype.
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A patient with a Philadelphia chromosome-positive (Ph+) chronic myeloid leukemia (CML) developed a blast crisis (FAB subtype AML-M2) without a monocytic involvement. Karyotype showed the presence of inv(16)(p13;q22) in addition to Ph, in 16/20 marrow metaphases.
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The purpose of this study is to examine the behavioral and developmental characteristics of children with inv(9). This case control study included 12 inv(9) subjects and 45 normal students. All of the subjects, together with their parents, underwent a psychiatric interview and parent questionnaire consisting of a Child Behavior Checklist (CBCL). The mean scores with regard to the social problems and total problems profiles of the CBCL were significantly higher in the inv(9) group than in the normal control group. The inv(9) group exhibited language and motor developmental delay. These findings suggest that there is a possibility of inv(9) being associated with child developmental or behavioral problems.
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A patient with chronic myelogenous leukemia (CML) associated with a remarkable increase of micromegakaryocytes in bone marrow was revealed to have an abnormality of a long arm of chromosome #3, i.e., inv(3)(q21q26), in addition to a complex Ph translocation: t(9;22;15)(q34;q11;q22). Although several cases of acute leukemia with inv(3)(q21q26) and abnormal megakaryocytes have been reported, this is the first case in which the association of inv(3)(q21q26) with a megakaryocytic abnormality was observed in a patient with CML. Our findings suggest that this structural rearrangement may be more specifically associated with abnormal thrombopoiesis than are other structural anomalies of 3q.