rotator cuff tear after subacromial injection

what is the incidence of rotator cuff tear after ultrasound guided subacromial injection with 40mg triamcinolon?
http://www.ncbi.nlm.nih.gov/pubmed/24289196

CTS and additional findings

One reason why it might be important to have ultrsound evaluation of the carpal tunnel syndrom before surgery or injection.
What is the name of the additional ultrasound finding in the images?
What is the prevalence of the finding?


http://www.ncbi.nlm.nih.gov/pubmed/23669805