Here's a summary of my MRI, quoted from a copy my doctor he gave me. I cut out all the stuff that ISN'T wrong.
There is a small bursal sided partial thickness tear involving the midsubstance of the conjoint tendon. The tear measures about 12mm in short axis and 10mm in long axis. Rest of the supraspinatus tendon shows evidence of mild tendinosis.
The biceps tendon shows circumferential fluid around in its extra-articular aspect and appearances suggest tenosynovitis. No tendon tear is identified.
1. A small bursal-sided partial thickness supraspinatus tear with associated supraspinatus tendinosis.
2. Tenosynovitis of the biceps tendon.
I had to Google some of the terms.
"Bursal-sided" refers to the bursa: "A small serous sac between a tendon and a bone".
I also found some info from the Mayo Clinic web site (really good web site, by the way). After further searching, I found more detailed information on Wikipedia about the Supraspinatus Muscle.
The bottom line is that I am now waiting to get an appointment to see a orthopaedic surgeon so he can decide if I need surgery. :-\