Tendons connect muscles to bones and obviously some tendons will connect to the bones of a joint such as the elbow.
Tendinitis of the elbow is inflammation
of the tendons that connect to the elbow with 2 examples being golfers and tennis elbows. Osteoarthritis
is a true joint disease. It is in the joint itself, while the tendons surround the joint. Obviously pain can be the main symptom of both.