My dad was diagnosed with Stage IV colon cancer 11 yrs ago; 4 recurrances since and now mets to sacr

Hi, I am new to posting but have read posts over the years. My dad was diagnosed with stage IV colon cancer in 2001. He has had 4 recurrances since, has a colostomy, left kidney was removed and has a ureter stent in remaining kidney because of scarring from radiation. He has had all the radiation he is allowed. Biopsy in Jan 2012 confirmed a malignant mass on his sacrum. Surgery is not an option due to location. He has been on Erbitux weekly since. Also has been on another chemo infusion (unsure of name) he has had that every other week since last May 2011; hooks up on Wed and disconnects on Fri. He has had tingling in his left leg for sometime and thought it was a side effect from chemo. In March it started to get worse, he explained itas sitting on a golf ball on his left butt cheek, pain so bad he could not sit or sleep, just walk. He also explained it as a charlie horse down the backs of his thighs. An mri was done 5/8/12 and his oncologist stopped all chemo treatments and referred him to a neurosurgeon for spinal compression. On 6/7/12 he had a lumbar laminectomy from his L2-S2 and was told his pain should disappear except for at the incision site in his back. The charlie horse type feel subsided but the pain in his butt become worse than ever and his left leg swelled. Ultrasound ruled out blood clots. Once home pain was unbearable in his pelvis and left leg so we brought him to ER. They said he has lymhedema in his left leg and admitted him because his creatine was elevated. While there, dad disclosed that he has become incontinent with urine, unsure if he is with bowel since he has a colostomy. They scanned his bladder and he still had 500cc even after voiding. He now has a catheter in place and is scheduled for a stent replacement on 6/25. He can't feel that he has emptied his bladder completely which may be a side effect from laminectomy or from swelling. In the meantime he has a different oncologist since his regular one is on vacation. We love the one he has now, as the family we have not been told much of anything over the last year. This oncologist has spent a lot of time since Friday looking over my dads chart from the last 11 years, communicating with the neurosurgeon and with a neurosurgeon from the mayo clinic. However we have found out that he has mets to his sacrum and also scar tissue compressing his nerves. IV diaudid every hr and oxycontin and oxycodone have not helped much with his pain. Yesterday they started him on IV dexamethasone to reduce swelling of the scar tissue and also a fentanyl patch, oxycontin and oxycodone. He is unable to go home until pain is controlled and just hope to have him on oral dexamethasone, fentanyl patch and as needed oxycodone. Sorry for the long post just wondering if anyone is familiar with this...I worry our time with dad is limited, he's only 64 years old. Thanks for listening