As with endothelial cell stimulation, 24-h IL-1β stimulation of tumour cells alone caused significant increase of both MDA-MB-231 and MCF7 adhesion (Fig. 1) to blood and lymphatic endothelial cells with MDA-MB-231 tumour cells having a significantly higher level of adhesion to lymphatic endothelial cells. The gene discussed is IL1B; the disease is neoplasm.