What is Kellgren-Lawrence grade 2 characterized by?

• A. No features
• B. Definite osteophytes and possible narrowing
• C. Severe sclerosis and deformity
• D. Doubtful narrowing

Answer: (B)

Kellgren-Lawrence grading uses what shows up on knee X-rays to stage osteoarthritis. In grade 2, you see definite osteophytes at the joint margins, with possible narrowing of the joint space due to cartilage loss. This combination indicates OA is present but not yet at the more advanced stage where joint space narrowing is definite and deformity or severe changes appear. Other descriptions fit earlier or later stages: no features is grade 0, doubtful narrowing corresponds to grade 1, and severe sclerosis with deformity fits the higher end of the spectrum (grade 4). So definite osteophytes with possible narrowing best matches grade 2.