Which knee-related finding is commonly described in rheumatoid arthritis?

• A. Gout crystals
• B. Baker cyst
• C. Osteophytes
• D. Chondromalacia

Answer: (B)

Rheumatoid arthritis causes chronic inflammation of the knee joint lining, leading to persistent joint effusions from synovitis. The excess fluid and inflammatory process can extend into the popliteal area, distending the gastrocnemio-semimembranosus bursa and forming a Baker’s cyst (popliteal cyst). This behind-the-knee swelling is a classic finding described with inflammatory arthritis like RA.

Gout crystals describe urate crystal deposition and are more typical of acute gouty arthritis, not a hallmark knee finding in RA. Osteophytes are bony growths associated with osteoarthritis and degenerative changes rather than RA. Chondromalacia refers to cartilage softening under the patella and is more aligned with patellofemoral pain rather than the inflammatory knee manifestations of RA.