The Benefits Review Board decision affirms the Decision and Order of Administrative Law Judge Krantz denying benefits a claim for temporary total disability based upon an injury to the right knee. This case involved a causation determination, as to whether the Claimant’s surgery and following disability were attributable to her claimed work injury, or instead were the natural progression of a pre-existing knee condition. The Administrative Law Judge agreed that the claimed 2004 left knee injury did not contribute to the subsequent need for surgery and that such condition was the natural and avoidable consequence of a pre-existing condition.