Reiter's syndrome usually affects which joint?

Reiter's syndrome usually affects which joint?

• A. Knee
• B. Wrist
• C. Ankle
• D. MPJ

Answer: (D)

Reiter's syndrome, or reactive arthritis, tends to produce an asymmetric inflammatory arthritis in the lower limbs after an infection. In the foot, the metatarsophalangeal joints are commonly involved, often presenting with pain and swelling in these forefoot joints. This makes the metatarsophalangeal joints the most characteristic and commonly affected in this context, more so than the knee, wrist, or ankle when focusing on forefoot pathology. The overall pattern helps distinguish it from other inflammatory arthritides, such as rheumatoid arthritis, which more classically involves the small joints of the hands symmetrically.

Reiter's syndrome, or reactive arthritis, tends to produce an asymmetric inflammatory arthritis in the lower limbs after an infection. In the foot, the metatarsophalangeal joints are commonly involved, often presenting with pain and swelling in these forefoot joints. This makes the metatarsophalangeal joints the most characteristic and commonly affected in this context, more so than the knee, wrist, or ankle when focusing on forefoot pathology. The overall pattern helps distinguish it from other inflammatory arthritides, such as rheumatoid arthritis, which more classically involves the small joints of the hands symmetrically.