cancer why do I get? you get radating pain of and on in my knee? I am not getting treated yet as I will be soon and hopefully before christmas. I also get it of and on near my groin area too. so I need to know why I get radiating pain in my left knee, as I said it is of and on more of than on but when it comes it lasts for about 3 seconds paifully then goes, and I need to know why? Thanks

The cancer may have involved some nerves in the pelvis. This causes pain down to the knee.