B3 L41/42: Rheumatology Flashcards
Many types of arthritis. What are 4 factors that diagnosis dependent on?
- History of symptoms
- Signs present
- Investigations
- Inflammatory joints with or without associated features should trigger your referral
What is rheumatoid arthritis?
Chronic systemic, destructive, inflammatory arthropathy of unknown aetiology
What is the cause of RA?
unknown aetiology
What is the prevalence of RA?
1-2%
Are males or females more affected by RA? What is the ratio?
Females (3:1)
What are the 2 peak onsets for RA?
Peak onset 55 years
○ Late childbearing years. Post partum - high risk of RA.
○ Second peak : 60-80 yo
Is RA disabling? What is the ratio of people who stop work 5 years after diagnosis?
Yes –> 20%
How many years does RA reduce life expectancy by?
7-10 years
What are the 3 Pathogenesis of RA?
• Family predisposition
○ First degree relative with RA (RR 1.5)
○ Monozygotic twins 12-15% concordance
• Genetics
○ RA strongly linked to MHC Class II antigens
○ HLA DRB10404
○ HLA DRB10401
• Environment
○ Smoking associated, anti-oxidants/pregnancy/alcohol is protective because dampening immune system?
○ Other triggers? Infections, microbiota, silica dust
What are 7 criteria in the diagnosis of RA-
American College of Rheumatology (ACR) Criteria 1986 (old classification criteria)?
- Morning stiffness > 1hr
- Three or more joints
- Smaller hand or feet joints
- Symmetrical distribution
- Positive Rheumatoid factor (and/or Anti CCP)
- Rheumatoid nodules
- X-ray changes (plus MRI, CT, US)
4/7 criteria and >6 weeks duration
What are 7 criteria in the diagnosis of RA- 2010 ACR/EULAR Classification Criteria for RA (current classification criteria)
- Score >6 = definite RA
- Better sensitivity & specificity for all stages of RA
- 1 or more joint definite synovitis (not explained by another disease)
- Joints small or large
- RF and anti-ccp (ACPA)
- CRP and ESR - markers of inflammation in blood
- Duration of symptoms - minumum 6/52 for diagnosis
What are 16 Clinical Features of RA?
- Pain and swelling on the affected joints
- Local tenderness to palpation and with ROM
- Classical “boggy” feeling to the joint (hard plasticine feeling?)
- Heat and redness of joint
- Thickening of tendons – tenosynovitis
- Nodules on tendons – triggering/rupture
- Reduced grip strength - RA specific symptom
- Ulnar deviation of fingers
- Boutonnière and Swan neck deformities in late RA
- Radial drift of carpals
- Prominence of ulnar styloid
- Fixed flexion at elbow - not specific to RA
- Frozen shoulder
- Retrocalcaneal bursitis - tarsal tunnel syndrome
- Knee effusions
- Baker’s cysts
- Hip and CV spine in established RA only
What are 5 Typical/Classical Clinical Features of RA?
- Polyarticular disease
- Gradual onset - weeks to months
- Predominant symptoms being pain, stiffness and swelling of many joints
- Morning stiffness (= inflammation) very common, slowness to move.
- 1/3 have systemic features including myalgia, fatigue, low grade fever, fatigue, weight loss and low mood
What are 3 Palindromic Onset
Clinical Features of RA?
- Episodic symptoms with several joints being affected for hours to days
- Symptom free periods may last days to months
- Hard to diagnose - patient might think it’s due to other injury? Need to take a proper history.
What are 4 Monoarthritis (rare)
Clinical Features of RA?
- Persistent single joint arthritis
- Frequently large joints; knee, shoulder, hip, wrist (in old women)
- Sole manifestation or herald the onset of polyarticular disease
- Often a history of trauma/initiating event
What are 6 Extra-articular manifestations of RA?
- Cardiovascular: Pericarditis, myocarditis - death.
- Respiratory: Pleuritis, intrapulmonary nodules, rheumatoid pneumoconiosis, diffuse interstitial fibrosis
- Neurological: Peripheral sensory neuropathy, Entrapment neuropathies, Cervical myelopathy
- Ocular: Episcleritis/scleritis and sicca symptoms
- Skin: Subcutaneous nodules. Vasculitis.
- Haematological: Anaemia, Splenomegaly, Felty’s syndrome
What is a respiratory extra-articular manifestations of RA?
Pleuritis, intrapulmonary nodules, rheumatoid pneumoconiosis, diffuse interstitial fibrosis
What is a neurological extra-articular manifestations of RA?
Peripheral sensory neuropathy, Entrapment neuropathies, Cervical myelopathy
What is an ocular extra-articular manifestations of RA?
Episcleritis/scleritis and sicca symptoms
What is a skin extra-articular manifestations of RA?
Subcutaneous nodules. Vasculitis.
What is a haematological extra-articular manifestations of RA?
Anaemia, Splenomegaly, Felty’s syndrome
What is a cardiovascular extra-articular manifestations of RA?
Pericarditis, myocarditis - death.
What are 3 things found in a blood test of RA?
- FBC, e/LFTs, ESR/CRP
- Rheumatoid factor (non-specific for RA)
- Anti-CCP antibodies (98% specific for RA)
- We test both RA factor and anti-CCP. If both present, then worse prognosis.
What are 3 things found in imaging of RA?
• X-rays: RA affects wrist & MCP, maybe PIP, never DIP. Erosion at joints, dislocation/subluxation, loss of joint space
○ Baseline hands and feet, other joints if indicated.
○ CXR.
• MRI: Early synovitis, early erosion (can’t see on X-ray), bone marrow oedema, tenosynovitis.
• Ultrasound: Rotator cuff/tendinopathy
What are the 5 Prognosis features of RA?
• Variable clinical course
• Disease fluctuation, flares, remission
• Poor prognostic markers
○ High initial disease activity
○ Poor functional capacity at diagnosis
○ High inflammatory markers ESR/CRP
○ Antibodies RF and anti-CCP (seropositive disease)
○ Erosions at baseline x-rays
• Increased risk for CVS disease, infections & lymphoma
• Reduced life expectancy and quality of life
What are 3 SPONDYLOARTHROPATHY (SpA) rheumatic conditions? 3 others?
- Ankylosing spondylitis
- Psoriatic arthritis
- Reactive arthritis
• Undifferentiated spondyloarthropathy
Juvenile onset spondyloarthropathy
Is SpA common?
Yes –> 1-3%
SpA can affect people of ny age but primarily __________.
young adults
What is a respiratory extra-articular manifestations of RA?
Pleuritis, intrapulmonary nodules, rheumatoid pneumoconiosis, diffuse interstitial fibrosis
What is a neurological extra-articular manifestations of RA?
Peripheral sensory neuropathy, Entrapment neuropathies, Cervical myelopathy
What is an ocular extra-articular manifestations of RA?
Episcleritis/scleritis and sicca symptoms
What is a skin extra-articular manifestations of RA?
Subcutaneous nodules. Vasculitis.
What is a haematological extra-articular manifestations of RA?
Anaemia, Splenomegaly, Felty’s syndrome
What is a cardiovascular extra-articular manifestations of RA?
Pericarditis, myocarditis - death.
What are 3 things found in a blood test of RA?
- FBC, e/LFTs, ESR/CRP
- Rheumatoid factor (non-specific for RA)
- Anti-CCP antibodies (98% specific for RA)
- We test both RA factor and anti-CCP. If both present, then worse prognosis.
What are 3 things found in imaging of RA?
• X-rays: RA affects wrist & MCP, maybe PIP, never DIP. Erosion at joints, dislocation/subluxation, loss of joint space
○ Baseline hands and feet, other joints if indicated.
○ CXR.
• MRI: Early synovitis, early erosion (can’t see on X-ray), bone marrow oedema, tenosynovitis.
• Ultrasound: Rotator cuff/tendinopathy
What are the 5 Prognosis features of RA?
• Variable clinical course
• Disease fluctuation, flares, remission
• Poor prognostic markers
○ High initial disease activity
○ Poor functional capacity at diagnosis
○ High inflammatory markers ESR/CRP
○ Antibodies RF and anti-CCP (seropositive disease)
○ Erosions at baseline x-rays
• Increased risk for CVS disease, infections & lymphoma
• Reduced life expectancy and quality of life
What is the prevalence of Psoriatic Arthritis before arthritis?
2/3
Is SpA common? What is the prevalence/
Yes –> 1-3%
SpA can affect people of ny age but primarily __________>
young adults
What is SpA?
Progressive chronic conditions with long term complications, musculoskeletal and extra-articular
Prognosis depends on the _______ and _____ of SpA.
form; severity
Treatment options for SpA have improved but remain _______.
suboptimal
What are 9 Clinical Features of SpA?
• Inflammatory back pain • Sacroiliitis • Absence of rheumatoid factor (no ACCP) • Associated HLA-B27+ • Asymmetrical peripheral arthritis • Dactilitis/enthesitis - sausage digits, synovitis of multiple joints & tendons. • Skin psoriasis • Eye inflammation (uveitis) Gastrointestinal/genitourinary symptoms
What is the prevalence of Ankylosing Spondylitis?
0.5%
_____ (males/females) at ___ yrs old are most affected by Ankylosing Spondylitis?
Males; 40 yrs
Spondylitis affects the _______ and begins in _______joints
spine; sacroiliac
What are 5 Clinical Features of AS?
- Lose lumbar lordosis
- Thoracic kyphosis
- Fixation due to ossification
- Cervical fixed
- Hip immobile
What are 8 features of inflammatory back pain?
• Worse with rest and inactivity. Different to mechanical pain which gets worse with activity.
○ Differentiation from mechanical back pain is critical.
• Morning stiffness improves during the day
• Nocturnal pain
• Responds to NSAIDs
• Onset before age 30 – mostly back to late teenage years
• Also affects chest wall and inflammatory peripheral arthritis ○ Enthesitis, dactylitis, large joint monoarthritis ○ Achilles tendinitis, plantar facsciitis, gluteal tendinitis, sausage digits • Extra-articular manifestations e.g. uveitis, lung fibrosis, aortitis • Associated diseases common e.g. IBD and psoriasis
What is the prevalence of Psoriatic Arthritis after arthritis?
1/3
What are 10 features of Psoriatic Arthritis?
- Pain and stiffness in affected peripheral joints
- Polyarticular and monoarticular
- Several patterns of joint involvement, very heterogeneous disease
- Axial involvement
- AS like disease – HLAB27+
- SI joints 10%
- 15-30% of psoriasis complicated by psoriatic arthritis
- Joint pain, decreased mobility and QoL, increased CVS disease
- Psoriasis and inflammatory arthritis ++ debilitating
- Therapy improving - remains unsatisfactory
What is Psoriatic Arthritis? List 6 characteristics?
- Autoimmune disease
- Common inflammatory skin disease 1-3% population
- Plaques of thick scaly skin
- Decreased transit time of a keratinocyte
- Activated immune cells in dermis
What is the cause of Reactive Arthritis?
1-6 weeks post infective illness
• Infection either enteric or urogenital
○ Salmonella, campylobacter, Chlamydia, streptococcal
○ 80% reactive arthritis are chlamydia related
Reactive Arthritis affects ___ (males/females) at ____ years old.
male; 2-40yrs old