Here is a list of organizations that grant wishes to adults with cancer or who are terminally ill:
http://www.memoriesoflove.org/
http://www.dreamcatchersusa.org/
http://www.adultwishfoundation.org/
http://www.willowfoundation.org.uk/Home
http://www.twilightwish.org/
http://www.nevertoolate.org/
http://www.happiness-unlimited.org/
http://www.dreamfoundation.org/
More foundations grating wishes to adults:
The Granted Wish Foundation
http://www.grantedwish.org/
OneGift Inc
http://www.happiness-unlimited.org/
Sunset Wish Foundation
http://www.sunsetwishfoundation.com/