Really sorry my computer crashed so now iv got to go to the libary... im sorry to hear that your grandfather has prostat cancer some things that may help- Once a day mens formula has Licopen wich may improve prostate health and you could reserch lowering his testosterone level to slow the growth and spread of the cancer u can do this with pills or shots it can have some side affects but dont take my opinon to seriusly go to a online medical page like www.mercksource.com (and there are a few others) there you can ask a real Dr and get better answers id say the safest bet is surgery just take it out and get it over with but i dont know his senaryo its very curabul and very common so good luck hope i was of some help sorry it took so long to answer