 2. Presence of a kissing bipolar lesion that is apposed to the index lesion and is deeper than Grade 2 ICRS classification as determined by MRI. Presence of a kissing bipolar lesion that is apposed to the index lesion and is deeper than Grade 2 and is discovered under arthroscopy are allowed. The non-index lesion, if indicated for treatment, should be treated with the study assigned treatment of the index lesion. 