Spondyloarthropathies Flashcards
What is spondyloarthopathy?
family of inflammatory arthritis characterised by involvement of both the spine and joints, principally in genetically predisposed (HLA b27 positive) individuals
What is HLA b27 associated with (not useful unless patients also have symptoms)
ankylosing spondylitis, reactive arthiritis, Crohn’s disease, uveitis
What are the Spondyloarthritis Disease Subgroups
Ankylosing Spondylitis
Psoriatic Arthritis
Reactive Arthritis
Enteropathic Arthritis
What is the difference between mechanical and inflammatory back pain?
Mechanical-worsened by activity, typically worst at the end of the day, better with rest
Inflammatory- worse with rest, better with activity, significant early morning stiffness (>30 mins)
What are the shared rheumatological features
of the Spondyloarthropathies
Sacroiliac and spinal involvement
Enthesitis-inflammation at insertion of tendons into bones e.g. Achilles tendinitis, plantar fasciitis
Inflammatory arthiritis- Oligoarticular,asymmetric,predominantly lower limb
Dactylitis - inflammation of entire digit
What are the shared extra-articular features
of the Spondyloarthropathies
Ocular inflammation (anterior uveitis, conjunctivitis)
Mucocutaneous lesions
Rare Aortic incompetence or heart block
no rheumatoid nodules
What is ankylosing spondylitis?
Chronic systemic inflammatory disorder that primarily affects the spine
- peripheral arthritis uncommon
- sacroiliac joint involvement
- late adolescence or early adulthood
- more common in men
Why is MRI such a good test to use
MRI can pick up inflammation much earlier- can see the bone marrow oedema
What is the ASAS classification criteria for Axial Spondyloarthritis (SpA)
In patients with > 3 months back pain and age of onset <45 years
Sacroillitis on imaging and >=1 SpA feature
OR
HLA-B27 positive and >=2 other SpA features
What are the clinical features of ankylosing spondylitis
Back pain ( neck, thoracic, lumbar)
enthesitis
Peripheral arthritis (shoulder, hips)-rare
Extra articular features
Anterior uveitis
Cardiovascular involvement (aortic valve/root )
Pulmonary involvement (fibrosis upper lobes)
Asymptomatic enteric mucosal inflammation
Neurological involvement (Rarely A-A subluxation)
Amyloidosis
What is a helpful way to remember features of ankylosing spondylitis
“A” disease
Axial Arthritis Anterior Uveitis Aortic Regurgitation Apical fibrosis Amyloidosis/ Ig A Nephropathy Achilles tendinitis Plantar Fasciitis
With ankylosing spondylitis what shows on examination?
Tragus/occiput to wall
Chest expansion
Modified Schober test
With ankylosing spondylitis what shows in the bloods
HLA B27 Inflammatory parameters (ESR,CRP,PV)
With ankylosing spondylitis what is shown on X-ray
Sacroillitis
Syndesmophytes
“Bamboo” spine
With ankylosing spondylitis what changes magic the seen on x-ray
Changes over a long period of time
e.g. sacroiliac sclerosis/ vertebral fusion/erosions