Background and purpose:Most breast cancer cell lines were derived from malignant pleural fluid or other tissues that metastasized from breast carcinoma.

• 背景与目的:乳腺癌细胞系大部分来源于乳腺癌转移所致的胸水或非原始乳腺癌组织来源,与真正的乳腺癌的生物学性状有很大差异。