subchondral sclerosis in osteoarthritis

subchondral sclerosis in osteoarthritis

increased density of subchondral bone; noted on radiograph; characteristic of osteoarthritis (Box 1)
Box 1: Characteristics of osteoarthritis in the foot
  • Asymmetrical hypertrophic inflammatory degenerative arthritis

  • Commonly affects the first metatarsophalangeal joint, medial sesamoid first metatarsal head joint, medial cuneiform first metatarsal joint, navicular cuneiform joint, talonavicular joint, but any joint may be affected, especially if there is a history of joint trauma

  • Focal loss of articular cartilage

  • Osteophytosis, showing on radiograph as bony 'lipping' (osteophytes) at the affected joint margins

  • Progressive uneven loss of the joint space (reflecting the loss of articular cartilage)

  • Subchondral sclerosis and subchondral cyst formation

  • Pain on joint movement and progressive loss of range of joint motion

  • Eventual ankylosis and resultant reduction of joint pain