Menten Björn, Buysse Karen, Zahir Farah, Hellemans Jan, Hamilton Sara J, Costa Teresa, Fagerstrom Carrie, Anadiotis George, Kingsbury Daniel, McGillivray Barbara C, Marra Marco A, Friedman Jan M, Speleman Frank, Mortier Geert
Center for Medical Genetics, Ghent University Hospital, Ghent, Belgium.
J Med Genet. 2007 Apr;44(4):264-8. doi: 10.1136/jmg.2006.047860. Epub 2007 Jan 12.
This report presents the detection of a heterozygous deletion at chromosome 12q14 in three unrelated patients with a similar phenotype consisting of mild mental retardation, failure to thrive in infancy, proportionate short stature and osteopoikilosis as the most characteristic features. In each case, this interstitial deletion was found using molecular karyotyping. The deletion occurred as a de novo event and varied between 3.44 and 6 megabases (Mb) in size with a 3.44 Mb common deleted region. The deleted interval was not flanked by low-copy repeats or segmental duplications. It contains 13 RefSeq genes, including LEMD3, which was previously shown to be the causal gene for osteopoikilosis. The observation of osteopoikilosis lesions should facilitate recognition of this new microdeletion syndrome among children with failure to thrive, short stature and learning disabilities.
本报告介绍了在三名无血缘关系的患者中检测到12q14染色体杂合性缺失,这些患者具有相似的表型,包括轻度智力发育迟缓、婴儿期生长发育不良、匀称性身材矮小和骨斑点症,其中骨斑点症是最具特征性的表现。在每例病例中,通过分子核型分析发现了这种间质缺失。该缺失为新发事件,大小在3.44至6兆碱基(Mb)之间,有一个3.44 Mb的共同缺失区域。缺失区间两侧没有低拷贝重复序列或节段性重复。它包含13个RefSeq基因,其中包括LEMD3,该基因先前已被证明是骨斑点症的致病基因。骨斑点症病变的观察应有助于在生长发育不良、身材矮小和学习障碍儿童中识别这种新的微缺失综合征。