Benign multiple sclerosis (MS) refers to a type of MS where someone has MS for over 15 years without developing severe disability. However, benign MS may change to a progressive form of MS ...

Another rare type, colloid carcinomas account for 1 percent to 3 percent of exocrine pancreatic cancers. These tumors tend to develop from a type of benign cyst called an intraductal papillary ...