Classification & external resources
|| M25.7, M77.9
Bone spurs, also known as osteophytes, are bony projections that form along joints. Bone spurs form due to the body's increase of a damaged joint's surface area; most commonly from the onset of arthritis. Bone spurs usually limit joint movement and typically cause pain. 
Additional recommended knowledge
Bone spurs form naturally on the back of spine as a person ages and are a sign of degeneration in the spine. In this case the spurs are not the source of back pains, but instead are the common symptom of a deeper problem. However, bone spurs on the spine can impinge on nerves, which leave the spine for other parts of the body. This impingement can cause pain in both upper and lower limbs and a numbness or tingling sensations in the hands and feet due to the nerves supplying sensation to their dermatomes. 
Spurs can also appear on the feet, either along toes or the heel, and can also occur on the hands. In extreme cases it has been known for these spurs to grow along a person's entire skeletal structure, along the knees, hips, shoulders, ribs, arms and ankles. Such cases are only exhibited with multiple exostosis.
Osteophytes on the fingers or toes are known as Heberden's nodes (if on the DIP joint) or Bouchard's nodes (if on the PIP joints).
Bone spurs may also be the end result of certain disease processes. Osteomyelitis, a bone infection, may leave the adjacent bone with a spur formation. Charcot foot, the neuropathic breakdown of the feet seen primarily in diabetics, will also leave bone spurs which may then become symptomatic.
Osteophyte formation has been classically related to any sequential and consequential changes in bone formation due to aging, degeneration, mechanical instability, and disease. Often osteophytes form in osteoarthritic joints due to damage and wear from inflammation. Calcification and new bone formation can also occur in response to mechanical damage in joints, or at the attachment points for ligaments and tendons.
- ^ MayoClinic.com
- ^ Laser Spine Institute
- ^ [Osteophyte formation in the vertebral column: a review of etiologic factors- part 1. Contemporary Orthopaedics, 29(1): 31-37, 1994]
|Diseases of the musculoskeletal system and connective tissue (M, 710-739)|
|Arthropathies||Arthritis (Septic arthritis, Reactive arthritis, Rheumatoid arthritis, Psoriatic arthritis, Felty's syndrome, Juvenile idiopathic arthritis, Still's disease) - crystal (Gout, Chondrocalcinosis) - Osteoarthritis (Heberden's node, Bouchard's nodes)
acquired deformities of fingers and toes (Boutonniere deformity, Bunion, Hallux rigidus, Hallux varus, Hammer toe) - other acquired deformities of limbs (Valgus deformity, Varus deformity, Wrist drop, Foot drop, Flat feet, Club foot, Unequal leg length, Winged scapula)
patella (Luxating patella, Chondromalacia patellae)
Protrusio acetabuli - Hemarthrosis - Arthralgia - Osteophyte
|Polyarteritis nodosa - Churg-Strauss syndrome - Kawasaki disease - Hypersensitivity vasculitis - Goodpasture's syndrome - Wegener's granulomatosis - Arteritis (Takayasu's arteritis, Temporal arteritis) - Microscopic polyangiitis - Systemic lupus erythematosus (Drug-induced) - Dermatomyositis (Juvenile dermatomyositis) - Polymyositis - Scleroderma - Sjögren's syndrome - Behçet's disease - Polymyalgia rheumatica - Eosinophilic fasciitis - Hypermobility|
|Dorsopathies||Kyphosis - Lordosis - Scoliosis - Scheuermann's disease - Spondylolysis - Torticollis - Spondylolisthesis - Spondylopathies (Ankylosing spondylitis, Spondylosis, Spinal stenosis) - Schmorl's nodes - Degenerative disc disease - Coccydynia - Back pain (Radiculopathy, Neck pain, Sciatica, Low back pain)|
|Soft tissue disorders||muscle: Myositis - Myositis ossificans (Fibrodysplasia ossificans progressiva)
synovium and tendon: Synovitis - Tenosynovitis (Stenosing tenosynovitis, Trigger finger, DeQuervain's syndrome)
bursitis (Olecranon, Prepatellar, Trochanteric)
fibroblastic (Dupuytren's contracture, Plantar fasciitis, Nodular fasciitis, Necrotizing fasciitis, Fasciitis, Fibromatosis)
enthesopathies (Iliotibial band syndrome, Achilles tendinitis, Patellar tendinitis, Golfer's elbow, Tennis elbow, Metatarsalgia, Bone spur, Tendinitis)
other, NEC: Muscle weakness - Rheumatism - Myalgia - Neuralgia - Neuritis - Panniculitis - Fibromyalgia
|Osteopathies||disorders of bone density and structure: Osteoporosis - Osteomalacia - continuity of bone (Pseudarthrosis, Stress fracture) - Monostotic fibrous dysplasia - Skeletal fluorosis - Aneurysmal bone cyst - Hyperostosis - Osteosclerosis|
Osteomyelitis - Avascular necrosis - Paget's disease of bone - Algoneurodystrophy - Osteolysis - Infantile cortical hyperostosis
|Chondropathies||Juvenile osteochondrosis (Legg-Calvé-Perthes syndrome, Osgood-Schlatter disease, Köhler disease, Sever's disease) - Osteochondritis - Tietze's syndrome|
|See also congenital conditions (Q65-Q79, 754-756)|