A New Case of Translocation T(2;7)(p23;q35) in Recurrent Pregnancy Loss.

Clinical medicine & research(2023)

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摘要
Recurrent pregnancy loss is a phenomenon caused by many etiologies. The majority of these causes are chromosomal anomalies. In this case report, cytogenetic analysis was performed on the family who consulted our department with the complaint of recurrent pregnancy loss. A normal karyotype was found in the female (46, XX); however, t(2;7)(p23;q35) translocation was detected in the male. Reciprocal translocations are a common class of chromosomal abnormalities, and we anticipate this case of translocation will be a new cause for recurrent pregnancy loss. In the analysis, preparations at the level of 500 bands were examined, and at least 20 metaphase areas were evaluated. From the results of cytogenetic and FISH (fluorescence in situ hybridization) analysis, we determined the male had t(2;7)(p23;q35) chromosomal anomaly. The probe binding the patient's 2p23 region signaled at the q-terminal of chromosome 7; however, the other two chromosomes (2 and 7) were normal. There is no report of such a case in the literature for recurrent pregnancy loss complaints. With this case, it will be reported for the first time that an embryo formed with the gametes carrying unbalanced genetic material of an individual with the karyotype 46, XY, t(2;7)(p23;q35) is incompatible with life.
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关键词
Chromosomal translocation,Cytogenetic analysis,Recurrent pregnancy loss
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