not sure what my .02 is worth: just went through almost disabling elbow pain on the out side of the joint. My LBS and I spent quite a bit of time adjusting the handlebars and they even suggested I switch to a straight across bar (I ride a commuter bike) which I probably will do after the first of the year. I was still in intense pain to the point of thinking about seeing a dr for the whole cortisone injection *yuck*. End result - my brake levers were just a tad too far for my reach. I could reach them but was using the tips of my fingers to start the pull which was stressing the tendons in my elbow! I've since moved the brake levers up on the bike and *voila* the elbow pain is gone. Don't know if this will help you or even apply to your situation - but I thought it ironic it was the simplest of things that fixed my problem!
Life should NOT be a journey to the grave with the intention of arriving safely in an attractive and well preserved body, but rather to skid in sideways, champagne in one hand, strawberries in the other, body thoroughly used up, totally worn out and screaming: "Yeah Baby! What a Ride!"