背景：肿瘤细胞的染色体数目畸变是肿瘤细胞的特征性改变之一。
Background: Chromosomal number abnormality is one of the characteristic changes in tumor cells.
在第6代之前染色体数目未发生改变。
The chromosome number of HMSCs remains original before passage 6.
结论：快速引物原位标记技术可用于鼻咽癌冰冻组织切片中染色体的检测，染色体数目的改变可作为鼻咽癌诊断的重要参考指标。
CONCLUSION: The technique of rapid PRINS could be used to detect chromosomes in frozen section tissues, and the chromosomal abnormalitie s would be helpful in diagnosis of NPC.
这会改变其染色体的数目，使每个细胞产生三对染色体，而通常每个细胞只有两对染色体。
This alters their plement of chromosomes, giving them three sets per cell instead of the usual two.
这会改变其染色体的数目，使每个细胞产生三对染色体，而通常每个细胞只有两对染色体。
This alters their plement of chromosomes, giving them three sets per cell instead of the usual two.
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