Flashcards in Seronegative arthropies Deck (24):
What are the disease subgroups of seronegative arthropathies?
′ Ankylosing Spondylitis
′ Reactive Arthritis ( Reiter's Syndrome)
′ Enteropathic Arthritis
′ Psoriatic Arthritis
′ Undifferentiated spondyloarthropathy
′ Juvenile spondyloarthropathy
What are the shared features seen in the joints of seronegative arthropathies?
′ Sacroiliac and spinal involvement
′ Enthesitis: Achilles tendinitis, plantar fasciitis…
′ Inflammatory arthritis:
λ Predominantly lower limb
′ Dactylitis (“sausage” digits)
What are the shared extra-articular features of seronegative arthropathies?
′ Ocular inflammation (Anterior uveitis, conjuntivitis)
′ Muco-cutaneous lesions
′ Rare Aortic incompetence or heart block
What makes seronegative arthropathies different from rheumatoid arthritis?
′ Different pattern of articular and extra-articular involvement
′ Associated with enthesitis and dactylitis
′ Absent serum Rheumatoid factor
′ Strong association with HLA B27
′ Prognosis is different
Ankylosing spondilitis - what is the epidemiology?
′ Late adolescence or early adulthood
′ More common in men 3-5:1
′ Strongest association with HLA B27
What are the clinical features of ankylosing spondilitis?
′ Inflammatory low back pain
′ Peripheral arthritis (shoulders,hips) – rare
′ Extra articular features:
λ Anterior uveitis
λ Cardiovascular involvement (aortic valve/root )
λ Pulmonary involvement (fibrosis upper lobes)
λ Asymptomatic enteric mucosal inflammation
λ Neurological involvement (Rarely A-A subluxation)
′ Eventually fusion of the intervertebral joints of the spine and SI joint
Patients complain of spinal pain and stiffness and they may also develop knee or hip arthritis. Spinal morning stiffness is marked and improves with exercise. Over time there is loss of spinal movement and development of a "question mark" spine, with loss of lumbar lordosis and increased thoracic kyphosis.
Why is ankylosing spondilitis known as the 'A' disease?
′ Axial Arthritis
′ Anterior Uveitis
′ Aortic Regurgitation
′ Apical fibrosis
′ Amyloidosis/ Ig A Nephropathy
′ Achilles tendinitis
′ Plantar Fasciitis
What are the investigations for ankylosing spondilitis?
′ Blood tests – FBC, U&Es, inflammatory markers
′ Immunology – none
′ Genetic testing – HLAb27 (90%)
′ X rays
- Bony spurs from the vertebral bodies – syndesmophytes
- These can bridge the intervertebral disc resulting in fusion producing a ‘bamboo spine’
′ MRI – can detect earlier features such as bone marrow oedema and enthesitis of the spinal ligaments. When changes seen it is described as axial SpA
What is the clinical test for ankylosing spondilitis?
In this test a mark is made at the level at the level of L5.
The examiner then places one finger 5cm below this mark and another finger at about 10cm above this mark. The patient is then instructed to touch his toes.
If the increase in distance between the two fingers on the patients spine is less than 5cm then this is indicative of a limitation of lumbar flexion.
This test allows serial measurements for patients with progressive disease to be undertaken.
How is a diagnosis of ankylosing spondilitis made?
Modified New York Criteria for Diagnosis of Ankylosing Spondylitis:
1. Lower back pain for 3 months
- Improved with exercise
- Not relieved by rest
2. Limited lumbar motion – Schober’s test
3. Reduced chest expansion
4. Bilateral, Grade 2 to 4, sacroiliitis on X ray
5. Unilateral, Grade 3 to 4, sacroiliitis on X ray
Definite AS if Criterion 4 or 5, plus 1,2 or 3
What is the treatment for ankylosing spondilitis?
′ Home exercises
′ Occupational therapy
′ Anti TNF treatment –
′ Disease modifying drugs for more progressive disease
SZP, MTX (peripheral arthritis)
-What are the clinical features of psoriatic arthritis?
′ Inflammatory Arthritis (5 subgroups)
1. Confined to distal interphalangeal joints (DIP) hands/feet
2. Symmetric polyarthritis (similar to RA)
3. Spondylitis with or without peripheral joint involvement
4. Asymmetric oligoarthritis with dactylitis
5. Arthritis mutilans
λ often asymmetric
λ may be associated with spondylitis
′ Nail involvement (Pitting, onycholysis)
λ Achilles tendinitis
λ Plantar fasciitis
′ Extra articular features (eye disease)
What is involved with the diagnosis of psoriatic arthritis?
λ Inflammatory parameters (raised)
λ Negative RF
λ Marginal erosions and “whiskering”
λ “Pencil in cup” deformity
What is the medical treatment for psoriatic arthritis?
λ Corticosteroids/joint injections
λ Disease Modifying Drugs (MTX,SZP…)
λ Anti TNF – Etanercept (Enbrel)
What is the non-medical treatment for psoriatic arthritis?
λ Occupational Therapy
What is reactive arthritis also known as?
What is reactive arthritis?
Infection induced systemic illness characterized primarily by an inflammatory synovitis from which viable microorganisms cannot be cultured.
′ Symptoms 1-4 weeks after infection.
′ Equal sex distribution
′ HLA B27 + Infection
It occurs in response to an infection in another part of body (GI/GU commonly)
What are the most common infections assoc. with reactive arthritis?
λ Urogenital. Chlamydia
λ Enterogenic. Salmonella, Shigella, Yersinia
What are the clinical features of reactive arthritis?
-what is the triad of symptoms seen?
′ General Symptoms (fever, fatigue, malaise)
′ Asymmetrical monoarthritis or oligoarthritis
′ Mucocutaneous lesions
- Keratodema Blenorrhagica
- Circinate balanitis
- Painless oral ulcers
- Hyperkeratotic nails
Most patients have a triad of symptoms: urethritis, conjunctivitis and arthritis
= reiter’s syndrome
(Large joints eg the knee become inflamed around 1‐3 weeks following the infection. The infection triggers an autoimmune arthropathy. )
What is the diagnosis of reiter's?
λ Inflammatory parameters (ESR,CRP,PV)
λ FBC, U&Es
λ HLA B27 (rarely necessary)
′ Cultures (blood, urine, stool)
′ Joint fluid analysis (rule out infection)
′ X-ray of affected joints
′ Ophthalmology opinion
What is the treatment for reactive arthritis?
Is aimed at the underlying infectious cause
¥ Intra articular (once sepsis ruled out)
¥ Eye drops
λ DMARDs (SZP) – occasionally if resistant/chronic
λ Occupational therapy
What is the prognosis for reactive arthritis?
′ Generally good
′ Recurrences not uncommon
′ Some develop a chronic form
What is enteropathic arthritis?
an inflammatory arthritis involving the peripheral joints and sometimes spine, occurring in patients with inflammatory bowel disease (Crohn’s disease and Ulcerative Colitis). Again it tends to be a large joint asymmetrical oligoarthritis