The correct treatment for rotator cuff tears remains a matter of debate. The varying characteristics of cuff tears – symptomatic versus asymptomatic, tear size, tendon quality, the presence of fatty atrophy, etc. – makes generalizations about the best treatment approach difficult. One thing shoulder specialists agree on is that tear enlargement is problematic. A cuff tear that enlarges may turn a once fixable tear into an unfixable one. Predicting which tears will enlarge and the rate at which they will is not an exact science. We welcome Dr. James Irrgang, PT, PhD, FAPTA & Dr. Luke Mattar, PhD from the University of Pittsburgh to discuss their study looking at tear propagation trends in patients with a symptomatic, isolated supraspinatus tears after 3 month of an initial trial of physical therapy.