目前 ,对于脉络膜黑色素瘤的分子生物学研究日新月异。但是 ,脉络膜黑色素瘤新鲜组织来源有限 ,制约了研究工作的发展。为了解决这一问题 ,我们拟从蜡块组织中提取DNA ,因为蜡块标本相对好保存 ,来源充足。但是蜡块标本经过固定、石蜡包埋等步骤后 ,对DNA会产生一些影响 ,所以? At present, the molecular biology of choroidal melanoma is rapidly changing. However, the limited source of fresh tissue of choroidal melanoma has restricted the development of research work. In order to solve this problem, we intend to extract the DNA from the wax tissue, because the wax samples are relatively well preserved and have ample source. However, the paraffin block specimen after fixed, paraffin embedding and other steps, the DNA will have some impact, so?