Question: what is a grade 1 rotator cuff tear?
Answer: Partial Thickness rotator cuff tears : Arthroscopic classification by Ellman. Ellman H, CORR, (254) 64-74, 1990. Grade 1: Partial tear < 3mm deep. Grade 2: Partial tear 3-6 mm deep. depth not exceeding one-half of the tendon thickness.