MSK disease Flashcards
what is arthritides
pain and stiffness of a joint /inflammation of the joint - multiple diseases
what are the acute symptoms of arthritis
pain, heat, redness and swelling
what are the two most common types of chronic arthritis
OA and RA - pain but no heat or redness
what is the most common type of joint disease
osteoarthritis - degenerative joint disease - progressive erosion of articular cartilage
what is the cause and result of osteoarthritis
associated with age - no initiating cause
formation of bony spurs and cysts at the margin of joint
which disease would you get bouchards and herberdens nodes
primary osteoarthritis - B = proximal nodes
H = distal nodes
which bones are primary OA affected by
fingers knees C and L spines
which types of sports are commonly affected by secondary OA
knee in basketball players and elbow in baseball players
what is the pathogenesis of secondary OA
loss of cartilage, forms spurs for fluid filled cysts in the marrow - subchondral cyst
what happens at the cellular level in secondary OA
chrondorcytes produce IL-1 that initiates matrix breakdown
prostaglandin derivatives induce release of lytic enzymes that prevent matrix synthesis
what is rheumatoid arthritis and what does it affect
chronic disorder producing non-suppurative proliferative synovitis - results in destruction of articular cartilage and ankylosis of joints
affects skin, muscles, heart lungs
what is ankylosis of joint spaces in RA
stiffening due to fusion of bone - due to formation of pannus (fibrovascular tissue) in the joint space
what are the various causes of RA
genetics HLADR4
primary exogenous arthritogen eg EBV
autoimmune
mediators of joint damage - cytokines
what is the criteria for diagnosis of RA
4 things morning stiffness arthritis hands/joints symmetrical nodules serum RA factor radiological narrowing
what is rheumatoid factor
present in most patients with RA
what is a more specific test for RA than rheumatoid factor
anti CCP - ACPA test
what is present in synovial fluid which tests for RA
neutrophils
what is seronegative arthritis and give example
lacks Rheumatoid factor
ankylosing spondylitis or reiters syndrome
what is the cause of infective arthritis and signs
bacterial staphylococcus
fever, leucocytosis and elevated ESR