Arthropathies Flashcards
How does enteropathic arthritis present and which joints does it normally affect?
Flares happen at the same time as flares of inflammatory bowel disease
- most commonly affects large joints of the lower limbs
Which joints does diffuse osteoarthritis affect and who is it most common in?
Distal interphalangeal joints
- most common in post-menopausal women
Typical age of onset of psoriatic arthropathy?
25-40
5 patterns of psoriatic arthritis?
Distal interphalangeal joint predominance (w/ nail changes)
Asymmetrical oligoarthritis (w/ dactylitis)
Symmetrial polyarthritis (resembles RA)
Psoriatic spondylitis
Arthritis mutilans
Which of the 5 patterns is the most common presentation of psoriatic arthritis, who is most common in, and what other features are associated with it?
Distal interphalangeal joint predominance
- most common in males
- strongly associated with NAIL CHANGES (onycholysis and pitting in the nail)
What does reactive arthritis commonly follow?
Dysentery
Chlamydia infection
Which limbs/joints does reactive arthritis usually affect?
Lower limbs (think hot tender acutely painful swollen knee)
What other inflammatory processes is reactive arthritis associated with?
Conjunctivitis
Urethritis
- phrase “can’t see, can’t pee, can’t bend the knee” fits the triad
Who is reactive arthritis most common in?
Females (15:1 vs males)
What do enteropathic arthritis, psoriatic arthritis, reactive arthritis, and ankylosing spondylitis all have in common?
They are all seronegative spondyloarthropathies
All heavily associated with HLA-B27 (history of IBD in the family increases likelihood of these at differential)
All negative for Rheumatoid factor (seronegative)
How can Rheumatoid arthritis be ruled out in a differential?
If joints affected include distal interphalangeal joints of feet or hands (RA affects proximal metacarpophalangeal/metatarsophalangeal)
