We report a patient with a unique combination of features, including microcephaly; mental retardation; poorly developed frontal lobes; hypoplastic pituitary gland; hypothyroidism; alopecia universalis; single maxillary central incisor; taurodontism; median palatal ridge; longitudinally grooved nails; and scoliosis. His unbalanced karyotype was found to be 45,XY,der(15;18)(q10;q10). The constellation of anomalies appears to represent a contiguous gene syndrome caused, at least in part, by deletion of TGIF and the gene responsible for hereditary hypotrichosis simplex. The phenotype of our patient differs other reported patients with del(18p). Possible explanations include (1) the effects of a different deleted region, (2) a positional effect caused by a gene close by, or (3) by interruption of a different gene resulting from chromosomal translocation.

译文

我们报告了一名具有独特特征组合的患者,包括小头畸形; 智力低下; 额叶发育不良; 垂体发育不良; 甲状腺功能减退; 普遍脱发; 单个上颌中切牙; 牛角牙症; 正中腭嵴; 纵向开槽的指甲; 和脊柱侧弯。发现他的不平衡核型为45,XY,der(15;18)(q10;q10)。异常星座似乎代表了一个连续的基因综合征,至少部分是由TGIF和负责遗传性低毛丝菌病的基因缺失引起的。我们患者的表型不同于其他报告的del患者 (18p)。可能的解释包括 (1) 不同缺失区域的影响,(2) 由接近的基因引起的位置效应,或 (3) 由染色体易位引起的不同基因的中断。

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