About 10 days ago my 13 year old daughter had to pull out of a tournament with a sore shoulder. We took her to our General Practitioner and based on the area of soreness, and associated movements, the doctor's diagnosis was an inflamed bursa sac. Not wanting to take any chances, we scheduled an MRI. The results came in this morning and it turns out she has a minor tear (12:00 to 2:00) of the Superior Labrum and a Glenoid Cyst. She scheduled to see an orthopedic surgeon in 5 days (next Wednesday). In searching through the forums, I've seen several post on labrum tears, but I'm trying to get a good understanding of how severe (or minor) this condition is and what the likelihood is that she will require surgery. She's a highly ranked sectional player and will be heartbroken if she can't play high school tennis this Fall. Any information, including past experiences, would be greatly appreciated. I'm also trying to understand what could have caused this type of injury and how it can be prevented in the future. Thanks in advance for the help.