The Board denied the Veteran's claims for increased ratings for his service-connected chondromalacia and DJD of both knees, finding that the conditions did not meet the criteria for a rating in excess of 10 percent.

The Veteran was granted an initial disability rating of 40 percent for lumbosacral strain, DJD, from December 17, 1997 to June 3, 2022, and the effective date for service connection for bilateral lower extremity radiculopathy was also set at December 17, 1997. However, a higher rating or TDIU was denied.

The Board denied a rating greater than 10 percent for right knee internal derangement, chondromalacia, and degenerative arthritis with painful motion, denied a compensable rating for the same condition with limited extension, but granted a 10 percent rating for right lateral knee instability.

The Board grants service connection for a left knee disability, including degenerative arthritis, chondromalacia, and meniscus tear, based on the evidence showing current diagnoses and continuous symptoms since service.

The Board denied service connection for right knee joint osteoarthritis and chondromalacia, finding no evidence of a chronic condition in service or within the applicable presumptive period. The claim was also denied based on a lack of medical nexus between the current disability and an in-service injury.