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摘要


第十八對染色體長臂缺失症後群是一種罕見的染色體異常疾病。其臨床表現是相當的多樣化;包括顏面異常(如顏面中部發育不良、鯉魚嘴等),智能障礙,身材矮小,聽力障礙,肢體異常,甚至免疫功能缺損等等。在本篇文章中,我們除了描述一位患有鑲嵌型(即有部分的細胞核型為正常,部分細胞核型為異常)第十八對染色體長臂缺失症後群女童之臨床表徵外,我們同時也在長期的追蹤過程中發現,該位患童的週邊血液淋巴球異常細胞(即含有第十八對染色體長臂部分缺失之淋巴球)經過一年的時間後並無法再次由週邊血液經細胞培養後測得,這個現象,我們也一併在文中提出討論。

並列摘要


18q deletion syndrome is a rare chromosomal disorder. The phenotype is highly variable but is characterized by minor facial anomalies such as midface hypoplasia, ”carp-shaped” mouth mental retardation, short stature, hearing impairment, limb abnormalities and even immunodeficiencies. We describe not only the clinical manifestations of a patient with mosaicism for 18q deletion, but also a unique phenomenon called ”preferential selection” in which abmormal chromosomes initially observed appeared normal at one year follow-up.

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