Punk metal pioneers D.R.I. Announced Wednesday that they are canceling a scheduled run of European tour dates after guitarist Spike Cassidy developed tendinitis in his finger. Cassidy has had numerous heath problems over the past few years, having been diagnosed with colon cancer in 2004. Cassidy has undergone chemotherapy, radiation treatments, and a series of surgeries related to the cancer, plus an emergency surgery in September 2012 to remove blockage caused by one of the cancer surgeries.