Grade 3 OA radiographic features are:

Grade 3 OA radiographic features are:

• A. Large osteophytes and marked joint space narrowing
• B. Moderate osteophytes and definitive joint space narrowing
• C. No osteophytes or joint space narrowing
• D. Definitive osteophytes; possible joint space narrowing

Answer: (B)

Radiographic grading of osteoarthritis often uses the Kellgren-Lawrence system, where grade 3 is defined by definite joint space narrowing due to cartilage loss and the presence of osteophytes. The osteophytes are present and of moderate size, reflecting established disease, while the joint space narrowing is clearly evident but not yet accompanied by the most severe deformities seen in the highest grade. Subchondral sclerosis may also be seen as part of the degenerative changes. This combination—moderate osteophytes with definite joint space narrowing—best fits the level described. Larger osteophytes with marked narrowing or deformity indicate a more advanced grade, absence of osteophytes or narrowing indicates no OA, and definite osteophytes with only possible narrowing fits an earlier stage.

Radiographic grading of osteoarthritis often uses the Kellgren-Lawrence system, where grade 3 is defined by definite joint space narrowing due to cartilage loss and the presence of osteophytes. The osteophytes are present and of moderate size, reflecting established disease, while the joint space narrowing is clearly evident but not yet accompanied by the most severe deformities seen in the highest grade. Subchondral sclerosis may also be seen as part of the degenerative changes. This combination—moderate osteophytes with definite joint space narrowing—best fits the level described. Larger osteophytes with marked narrowing or deformity indicate a more advanced grade, absence of osteophytes or narrowing indicates no OA, and definite osteophytes with only possible narrowing fits an earlier stage.