自创立人染色体技术后,明确了各种染色体综合征的病因。新近,由于发现了许多精确的分带技术,除新明确的染色体综合征外,对原来典型染色体综合征进行亚分类。几乎在每个染色体上能发现有部分三体或部分缺失。现在许多病例已阐明易位节段的起因和发现以前不能检出的微小、复杂的结构重排,特别是平衡 Since the establishment of human chromosome technology, a clear etiology of various chromosome syndrome. Recently, due to the discovery of many accurate zonation techniques, in addition to newly identified chromosomal syndromes, the original classic chromosome syndrome was sub-classified. Almost every chromosome can be found in part of the body or part of the missing. Now, many cases have elucidated the cause of the translocation segment and found tiny, complex structural rearrangements that were previously undetectable, particularly the balance