<s>[INST] brotherinlaw; stage 4 cancer of prostate,lung & liver. now he is suffering thru blood clots thru the kidneys; they have put in a catheter but the blood clots keep clogging it. give me an idea of what to expect; I don t expect you to give blow by blow, just something so we can know what to look out for. what is causing the bloodclots we don t exactly know; don t want to open him up unless life threatening. [/INST] Hello, I have gone through your query and understand your concern. You have to understand that Cancer itself is the risk factor for the blood clot. Because tumor cells release some chemicals which promote blood clot formation. Further cancer in the liver and lung are potential to cause blood clots, and also he is in stage 4 stage. As he is in stage 4, he may now either immobile or bedridden. This in turn increase the risk of blood clot formation and deep vein thrombosis (blood clot formation in deep veins). If he is on chemotherapy or radiotherapy, it may also pose him to the risk of blood clot formation. At this stage, he needs blood thinners like injectable Heparin or Oral warfarin. Hope this helps. Please write back for further queries. Wishing you good health. </s>