BCAS1（breast carcinoma amplified sequence 1），癌症关联基因，基因ID：8537，该基因位于20q13区，在多种肿瘤类型中被扩增，并与更具侵袭性的肿瘤表型相关。在从该区域鉴定的基因中，发现在三个扩增的乳腺癌细胞系和一个在20q13.2处未扩增的乳腺肿瘤中高表达。然而，该基因不在最大扩增的共同区域中，在乳腺癌细胞系MCF7中未检测到其表达，该区域被高度扩增。尽管不一致表达，这个基因是一个候选癌基因。[由RefSeq提供，2016年4月]This gene resides in a region at 20q13 which is amplified in a variety of tumor types and associated with more aggressive tumor phenotypes. Among the genes identified from this region， it was found to be highly expressed in three amplified breast cancer cell lines and in one breast tumor without amplification at 20q13.2. However， this gene is not in the common region of maximal amplification and its expression was not detected in the breast cancer cell line MCF7， in which this region is highly amplified. Although not consistently expressed， this gene is a candidate oncogene. [provided by RefSeq， Apr 2016]。