`` It 's amazing what can be done so long as you catch it early . '' David Prowse , who played Darth Vader in `` Star Wars , '' has prostate cancer . Score: 7 Actor said every man over 50 should have a blood test for prostate cancer .
David Prowse , who played Darth Vader in `` Star Wars , '' has prostate cancer . Score: 7 Actor said every man over 50 should have a blood test for prostate cancer .