The clinical image of a chronic bursitis and a tendinosis in the shoulder could be quite similar. There are soms simple tricks to distinguish the both, so that you can optimize your treatment strategy.
What is a positive straight leg raise (SLR) ?
6 different stages are described, which could be diagnostically very important.
A negative straight leg raise doesn't exclude a symptomatic lumbar disc protrusion or internal derangement.
Also be aware of a "sign of the buttock".