Service connection for left knee disability is granted.

Board reasoning

The Board granted service connection or increased ratings for all conditions where the evidence supported a change and denied acne for lack of evidence of compensable scarring or disfigurement. In each grant or denial, the Board weighed lay statements and medical opinions, considered secondary and direct service connections, and applied DeLuca and applicable rating criteria to determine functional impairment and proper rating. The Board cited medical examinations and lay testimony to find either a present disability or the appropriate level of disability, and explained why a higher rating was not warranted in certain aspects, while noting secondary relationships between knee conditions.