In 1978, employee suffered a right knee injury which resulted in some internal derangement that required a surgical intervention. On November 29, 1978, Dr. T. J. Ryan performed an arthoscopy and arthrotomy surgery with removal of torn lateral semilunar cartilage. Employee missed about five weeks of work after that surgery.
The administrative law judge determined that employee's preexisting right knee condition amounted to a 20\% permanent partial disability as of September 8, 2008, the date of the primary right shoulder injury. After reviewing the evidence, we disagree with this finding.
At the hearing before the administrative law judge on June 26, 2012, employee testified on direct examination about his "current physical complaints" with respect to his right knee. Transcript, page 11. But employee did not testify as to the degree of disability affecting his right knee condition as of September 8, 2008. On cross-examination by counsel for the Second Injury Fund, employee testified that his right knee problems worsened significantly after the September 2008 injury, because he is no longer able to pull himself up into his truck with his arms, so a greater strain is placed on his knees. Employee also testified that he did not have to wear a knee brace until after the primary injury. Then, on redirect examination, employee's counsel asked if employee had physical complaints as to his right knee between 1978 and 2008. Employee forthrightly acknowledged: "Not really. I mean, no more than old age, you know, you get older, but nothing like what it is now." Transcript, page 20.
Employee presented the expert medical testimony of Dr. Musich, who rated employee's right knee condition at 20 % permanent partial disability of the right lower extremity at the level of the knee. But notably, Dr. Musich did not rate employee's right knee condition "as of" September 8, 2008, and in fact did not provide any temporal indicators in his opinion other than to state that, "[s]ubsequent to" employee's 1978 surgery, employee "has continued to complain of chronic intermittent activity related right knee pain." Transcript, page 33. To the extent that these temporally vague comments from Dr. Musich can be read as rating a preexisting permanent partial disability of the right knee, this opinion tends to conflict with employee's testimony that he had virtually no complaints (other than what would be expected with aging) with respect to his right knee until after the primary injury in 2008. Given these circumstances, we find Dr. Musich's opinion lacking credibility to the extent he assigns 20 % preexisting permanent partial disability to employee's right knee condition. Rather, we credit employee's own testimony as to his physical limitations referable to the right knee. We find that employee's right knee condition did not constitute a permanent partial disability until after the primary injury.
We affirm and adopt the administrative law judge's findings with respect to the nature and extent of disability referable to the primary injury and to employee's preexisting left shoulder condition.