If you (or someone you know) has metastatic cancer of the lung, prostate, colon, rectum, kidney, pancreas or malignant melanoma that is not responding to standard treatments, you may be able to participate in our clinical trial designed to evaluate the safety of a new type of cell therapy. Specifically, we are testing the safety and tolerability of the infusion of a type of your own white blood cells called NK cells. 02/28/2010 (Source: Kidney Cancer Association)