Other Causes of knee pain:
o Bone Tumor (rare)
o Fracture
o Patella Tracking Disorder (Kneecap Misalignment)
o Medial Synovial Plica Irritation
o Synovial Sarcoma (rare)
o Dislocation of the kneecap.
o Hypermobility Syndrome
o Infection in the joint (Knee Arthritis)
o Refferal pain ( e.g. knee pain radiating from hip joint )
o Juvenile Arthritis (Juvenile Rheumatoid Arthritis, Still's Disease)
o Ankylosing Spondylitis:
Rheumatoid arthritis of the spine ;called also Rheumatoid spondylitis.
o Aseptic Bone Necrosis:
Temporary or permanent loss of the blood supply to a bone.
o Crohn's Disease:
Chronic inflammation of the distal portion of the ileum, often spreads to the colon, and is characterized by diarrhea, cramping, loss of appetite and weight with local abscesses and scarring ;called also regional enteritis, regional ileitis.
o Kawasaki Disease:
An acute febrile disease of unknown cause affecting especially infants and children.
o Osteochondritis Dissecans:
Partial or complete detachment of a fragment of bone and cartilage at a joint.
o Psoriatic Arthritis:
A severe form of arthritis marked by inflammation, psoriasis of the skin or nails, and a negative test for rheumatoid factor; called also Psoriasis Arthropathica.
o Rheumatoid Arthritis (RA):
A chronic autoimmune disease marked especially by pain, stiffness, inflammation, swelling, and sometimes destruction of joints; called also atrophic arthritis.
o Sarcoidosis:
A chronic disease of unknown cause that is characterized by the formation of nodules resembling true tubercles especially in the lymph nodes, lungs, bones, and skin.
o Sickle Cell Anemia:
A chronic anemia that occurs mostly in individuals with African or Mediterranean origin.
o Systemic Lupus Erythematosus:
A connective tissue disease of unknown cause that occurs chiefly in women characterized by fever, skin rash, arthritis, acute hemolytic anemia, small hemorrhages in the skin and mucous membranes, inflammation of the pericardium, and in serious cases by involvement of the kidneys and central nervous system.
o Ulcerative Colitis:
Chronic inflammation of the colon marked by diarrhea with discharge of mucus and blood, cramping abdominal pain, inflammation and edema of the mucous membrane with patches of ulceration.
o Lyme Disease:
An infectious disease that is usually starts by the skin lesion erythema migrans and fatigue, fever, and chills and if left untreated may later present itself in cardiac and neurological disorders, joint pain, and arthritis. The causative agent is a spirochete of the genus Borrelia (B. burgdorferi) transmitted by the bite of a tick especially of the genus Ixodes; called also Lyme, Lyme borreliosis.