In rheumatoid ahritis the characteristic joint involvement is:: (A) Spine, (B) Knee, (C) Metacarpophalangeal joint, (D) Hip joint
Answer is C. The hallmark feature of rheumatoid ahritis (RA) is persistent symmetric polyahritis (synovitis) that affects the hands and feet, although any joint lined by a synol membrane may be involved. In general, the small joints of the hands and feet are affected in a relatively symmetric distribution. In decreasing frequency, the metacarpophalangeal (MCP), wrist, proximal interphalangeal (PIP), knee, metatarsophalangeal (MTP), shoulder, ankle, cervical are involved.