VEGFC and breast cancer: As high levels of COX-2 expressed by MDA-MB-231 cells was shown to contribute to its metastatic phenotype whereas nonmetastatic MCF-7 cells did not express COX-2 (Liu and Rose, 1996), we examined whether there is a relationship between COX-2 expression and VEGF-C producing ability, using additional human breast cancer cell lines T-47D (nonmetastatic) and Hs578T (metastatic).