These cells are after that analyzed under a microscope to consider alterations that may be precursors to tumor. The purpose of screening is to identify abnormal cells and take them off before they become cancerous. Tale continues below advertisement Tale continues below advertisement Once abnormal cells are located, follow-up testing are done to determine if they represent significant precancerous adjustments, that may then be treated with removal by excision or laser beam ablation.Teacher Johann de Bono, Regius Teacher of Cancer Analysis in the Institute of Cancers Research, London, stated: ‘Immunotherapy functions for a comparatively small band of guys with advanced prostate cancer-but when it functions, it works really. If we are able to identify beforehand who will advantage, then it will accelerate the passing of immunotherapy into regular use for sufferers. ‘Our new research has revealed a definite group of guys with advanced prostate tumor whose tumours possess biological features which could make them more likely to react to immunotherapy medicines such as for example pembrolizumab.