What is the definition or description of: rotator cuff tear?

Please see my blog..: "the incidence of rotator cuff tears increases with age, and a specific injury is not required. The rotator cuff is comprised of four small muscles, the supraspinatus, infraspinatus, subscapularis and teres minor. These muscles are responsible for proper motion and stability of the shoulder joint.". For more info please visit http://drmarkgalland.Com/category/shoulder/.

Rotator cuff tear: There are 4 muscles and tendons that make up the rotator cuff giving the shoulder lifting and rotational strength as well as contributing to stability of the shoulder joint.

Torn away from bone.: When one or more of the rotator cuff tendons are torn off their bony insertion, it is called a rotator cuff tear.