Medicine C Flashcards
What genes are associated with rheumatoid arthritis?
- HLA DR4
- HLA DR1
What role does rheumatoid factor play in RA?
Rheumatoid Factor(RF) is an autoantibody presenting in around 70% of RA patients.
This autoantibody targets IgG causing systemic inflammation.
Rheumatoid factor is most often IgM however they can be any class of immunoglobulin.
What antibodies are seen in RA?
Anti-ccp
RF
Anti-CCP antibodies vs RF?
Cyclic citrullinated peptide antibodies (anti-CCP antibodies)are autoantibodies that are more sensitive and specific to rheumatoid arthritis than rheumatoid factor.
- note Anti-CCP often predates RA and can indicate whether the patient may go on to develop the condition.
Presentation of RA:
It typically presents with asymmetrical distal polyarthropathy. The key symptoms are joint:
- Pain
- Swelling
- Stiffness
- Nodules around the joints
- Early hand involvement affecting MCP and PIP
What joints are commonly affected in RA?
- Proximal Interphalangeal Joints (PIP) joints
- Metacarpophalangeal (MCP) joints
- Wrist and ankle
- Metatarsophalangeal joints
- Cervical spine
- Large joints can also be affected such as the knee, hips and shoulders.
Systemic symptoms of RA:
- Fatigue
- Weight loss
- Flu like illness
- Muscles aches and weakness
Painful DIP joints = ?
Osteoarthritis
What is atlantoaxial subluxation?
Atlantoaxial subluxation occurs in the cervical spine. The axis (C2) and the odontoid peg shift within the atlas (C1). This is caused by local synovitis and damage to the ligaments and bursa around the odontoid peg of the axis and the atlas. Subluxation can cause spinal cord compression and is an emergency. This is particularly important if the patient is having a general anaesthetic and requires intubation. MRI scans can visualise changes in these areas as part of the pre-operative assessment.
Signs in the hands on examination in a patient with rheumatoid arthritis:
Palpation of thesynoviumin around joints when the disease is active will give a “boggy” feeling related to the inflammation and swelling.
Key changes to look for and mention when examining someone with rheumatoid arthritis are:
- Z-shaped deformity to the thumb
- Swan neck deformity (hyperextended PIP with flexed DIP)
- Boutonnieres deformity (hyperextended DIP with flexed PIP)
- Ulnar deviation of the fingers at the knuckle (MCP joints)
Extra-articular manifestations of RA:
- Pulmonary fibrosis with pulmonary nodules (Caplan’s syndrome)
- Bronchiolitis obliterans (inflammation causing small airway destruction)
- Felty’s syndrome(RA, neutropenia and splenomegaly)
- Secondary Sjogren’s Syndrome(AKA sicca syndrome)
- Anaemia of chronic disease
- Cardiovascular disease
- Episcleritis and scleritis
- Rheumatoid nodules
- Lymphadenopathy
- Carpel tunnel syndrome
- Amyloidosis
Diagnosis and investigations for RA:
- Check rheumatoid factor
- If RF negative, check anti-CCP antibodies
- Inflammatory markers such as CRP and ESR
- X-ray of hands and feet
Ultrasound scan of the joints can be used to evaluate and confirm synovitis. It is particularly useful where the findings of the clinical examination are unclear.
What X-ray changes are seen in RA?
- Joint destruction and deformity
- Soft tissue swelling
- Periarticular osteopenia
- Bony erosions
When to refer a patient to rheumatology in suspected RA?
- when should this be an urgent referral?
NICE recommend referral for any adult with persistent synovitis, even if they have negative rheumatoid factor, anti-CCP antibodies and inflammatory markers.
The referral should be urgent if it involves the small joints of the hands or feet, multiple joints or symptoms have been present for more than 3 months.
What is the DAS 28 score?
The DAS28 is theDisease Activity Score. It is based on the assessment for 28 joints and points are given for:
- Swollen joints
- Tender joints
- ESR/CRP result
It is useful in monitoring disease activity and response to treatment.
Short term management of RA?
A short course of steroids can be used at first presentation and during flare-ups to quickly settle the disease.NSAIDs/COX-2 inhibitorsare often effective but risk GI bleeding so are often avoided or co-prescribed withproton pump inhibitors(PPIs).
First line for long term management of RA?
First-line monotherapy with methotrexate, leflunomide or sulfasalazine. Hydroxychloroquine can be considered in mild disease and is considered the “mildest” anti rheumatic drug.
Epidemiology of rheumatoid arthritis:
Affects 1% of the population.
3:1 Female: Male
Any age most commonly starting in middle age (58).
Rheumatoid arthritis risk factors:
(remember for osce histories)
Female sex
No live births
Breastfeeding decreases risk
Smoking
Obesity
Alcohol
Genetics - HLA DRB1
What is methotrexate and what cautions need to be taken?
Folate antagonist
- prescribe with folic acid
-Teratogenic
- Needs regular monitoring with FBC, U&E, liver profile
- Can cause acute pneumonitis
- Caution using with other folate antagonists e.g trimethoprim
What are the complications of rheumatoid arthritis?
Deformity resulting in disability
Osteoporosis (directly from RA and due to steroid treatments)
Cardiovascular disease x2
Infection (due to disease and treatment)
What is dactylitis and what is it seen in?
Dactylitis or sausage digit is inflammation of an entire digit, and can be painful.
- seen in psoriatic arthritis
Frailty syndromes
Falls: collapse, legs gave way, ‘found lying on floor’
Immobility: sudden change in mobility, ‘gone off legs’ stuck in toilet’
Delirium: new acute confusion or sudden worsening of confusion in someone with previous dementia/memory loss
Incontinence: new onset or worsening of urine or faecal incontinence
Susceptibility to side effects of medication: confusion with codeine, hypotension with antidepressants, drug to drug interactions, AKI
How can frailty be assessed?
Up and go test
•PRISMA 7
• Edmonton Frailty Scale PDF
•Rockwood Frailty Score
•Clinical Frailty Scale app: based on Rockwood
• Beware assessing in acute illness
What is the up and go test?
• Timed UP and GO test: stand up from chair, walk 3m, turn round, walk back and sit down. >10s frailty likely
What drugs are associated with adverse outcomes in frailty?
Benzodiazepines
NSAID’s
Antihypertensives
Opioids
Anticholinergics
Complications of anticholinergics in the elderly
Anticholinergics: unsteadiness, blurred vision, dry mouth, urinary retention, confusion
Commonly prescribed anticholinergics in the elderly
Amitryptiline
Chlorphenamine (piriton)
Oxybutinin (urinary incontinence)
Baclofen
Prochlorperazine
Loperamide (diarrhoea)
Antipsychotics
Complications of benzo’s in the elderly
Benzodiazepines: falls, regular use increases all-cause mortality, confusion
Complications of antihypertensives in the elderly
Hypotension -> falls
AKI
Complications of opioids in the elderly
Opioids: constipation, falls, delirium
Complications of NSAID’s in the elderly
NSAID: AKI and gastric ulceration
Risk factors for fragility fracture
•Previous osteoporotic fragility fracture.
•Current or frequent recent use of oral corticosteroids.
•Low body mass index (less than 18.5 kg/m2)
•Smoker.
•Alcohol intake > 14 units per week.
•A secondary cause of osteoporosis: eg endocrinological: eg POI (untreated) in females, hyperthyroidism, GI malabsorption (eg IBD, coeliac),
Rheumatological eg RA
How to assess someone at risk of a fragility fracture:
- investigations?
Calculate 10 year fragility fracture score (eg FRAX or Qfracture)
DEXA if score >10% or Straight to DEXA if PMH fragility fracture
What is a DEXA Score?
How to interpret the score?
A measurement of bone mineral density as compared to that of a 30 year old adult
(Z score compares your BMD to what is normal in someone your age and body size).
• Osteopenia: T score -1 to -2.4 (based on WHO criteria)
• (Osteoporosis T-score -2.5 and below, normal range -1 and above)
Management of osteopenia in the elderly
• Modify risk factors (smoking, alcohol, BMI modification, medication review)
• Weight bearing exercise
• Dietary modification: sufficient calcium (Edinburgh score?)
• Consider calcium and vitamin D supplementation
• Plan to repeat DEXA usually within 2 years (CKS)
What is alendronic acid?
Bisphosphonate
Complications of bisphosphonates
Check good dental hygiene and ongoing dental care (risk osteonecrosis of jaw).
Upper GI irritation
Atypical fractures (sudden onset hip/thigh pain)
Side effects of metformin
Diarrhoea and lactic acidosis
Patients on simvastatin and amlodipine have a much higher risk of rhabdomyolysis
Should not go above 20mg simvastatin with patients taking amlodipine
Risks of taking aspirin
AKI
GI Bleed
Essential questions to ask in an axial spondyloarthropathy history:
(related diseases)
Personal / family history of the following HLAB27:
- Anterior uveitis
- IBD
- Skin psoriasis
- Peripheral joint disease
- Breathlessness
- Soreness in ankle (achilles)
Key joints affected in ankylosing spondylitis:
Sacroiliac
Vertebral column
How does AS present?
Presents in young adults with symptoms developing over approx 3 months:
The main presenting features are lower back pain and stiffness and sacroiliac painin the buttock region. The pain and stiffness is worse with rest and improves with movement. The pain is worse at night and in the morning and may wake them from sleep. It takesat least 30 minutesfor the stiffness to improve in the morning and it gets progressively better with activity throughout the day.
Symptoms can fluctuate with “flares” of worsening symptoms and other periods where symptoms improve.
Vertebral fracturesare a key complication of AS.
Dactylitis
Dactylitisis inflammation in a finger or toe.
Associated symptoms of ankylosing spondylitis:
- Systemic symptomssuch as weight loss and fatigue
- Chest painrelated tocostovertebral andcostosternaljoints
- Enthesitisis inflammation of theentheses. This is where tendons or ligaments insert into bone. This can cause problems such asplantar fasciitisandachilles tendonitis.
- Dactylitisis inflammation in a finger or toe.
- Anaemia
- Anterior uveitis
- Aortitisis inflammation of the aorta
- Heart blockcan be caused by fibrosis of the heart’s conductive system
- Restrictive lung diseasecan be caused by restricted chest wall movement
- Pulmonary fibrosisat the upper lobes of the lungs occurs in around 1% of AS patients
- Inflammatory bowel diseaseis a condition associated with AS
Schobers test
Have the patient stand straight. Find theL5 vertebrae. Mark a point 10cm above and 5cm below this point (15cm apart from each other). Then ask the patient to bend forward as far as they can and measure the distance between the points.
If the distance with them bending forwards isless than 20cm, this indicates a restriction in lumbar movement and will help support a diagnosis of ankylosing spondylitis.
Investigations for ankylosing spondylitis:
- Inflammatory markers (CRP and ESR) may rise with disease activity
- HLA B27 genetic test
- Xray of the spine and sacrum
- MRI of the spine can showbone marrow oedema early in the disease before there are any xray changes.
What X-ray changes are seen in ankylosing spondylitis?
“Bamboo spine” is the typical exam description of the x-ray appearance of the spine in later-stage ankylosing spondylitis. This is worth remembering for your exams.
Xray images in ankylosing spondylitis can show:
- Squaring of the vertebral bodies
- Subchondral sclerosis and erosions
- Syndesmophytes are areas of bone growth where the ligaments insert into the bone. They occur related to the ligaments supporting the intervertebral joints.
- Ossification of the ligaments, discs and joints. This is where these structures turn to bone.
- Fusion of the facet, sacroiliac and costovertebral joints
Medications used to to treat ankylosing spondylitis:
- NSAIDscan be used to help with the pain. If the improvement is not adequate after 2-4 weeks of a maximum dose then consider switching to another NSAID.
- Steroids can be used during flares to control symptoms. This could be oral, intramuscular slow-release injections or joint injections.
- Anti-TNF medications such as etanercept or amonoclonal antibody against TNF such as infliximab, adalimumab or certolizumab pegolare effective in treating the disease activity in AS.
Holistic management of ankylosing spondylitis:
- Physiotherapy essential mainstay! Ideally by a specialist.
- Exercise and mobilisation
- Avoid smoking
- Bisphosphonates to treat osteoporosis
- Treatment of complications
- Surgery is occasionally required for deformities to the spine or other joints
Effect of NSAID’s on ankylosing spondylitis:
Symptomatic pain relief
Also disease modifying!
What are the 5 A’s of ankylosing spondylitis?
Apical fibrosis
AV block
Aortic regurge
Anterior uveitis
Achilles Tendonitis
What is arthritis mutilans?
This is the most severe form of psoriatic arthritis. This occurs in the phalanxes. There is osteolysis (destruction) of the bones around the joints in the digits. This leads to progressive shortening of the digit. The skin then folds as the digit shortens giving an appearance that is often called a “telescopic finger”.
Presentation of psoriatic arthritis:
The condition does not have a single pattern of affected joints in the same way as osteoarthritis or rheumatoid. There are several recognised patterns:
Symmetrical polyarthritis presents similarly to rheumatoid arthritis and is more common in women. The hands, wrists, ankles and DIP joints are affected. The MCP joints are less commonly affected (unlike rheumatoid).
Asymmetrical pauciarthritis affecting mainly the digits (fingers and toes) and feet. Pauciarthritis describes when the arthritis only affects a few joints.
Spondylitic patternis more common in men. It presents with:
- Back stiffness
- Sacroiliitis
- Atlanto-axial joint involvement
- Plaques of psoriasis on the skin
- Pitting of the nails
- Onycholysis(separation of the nail from the nail bed)
- Dactylitis(inflammation of the full finger)
- Enthesitis(inflammation of the entheses, which are the points of insertion of tendons into bone)
- Eye disease (conjunctivitisandanterior uveitis)
- Aortitis (inflammation of the aorta)
- Amyloidosis
What screening tool is used to psoriatic arthritis?
PEST Tool (Psoriasis Epidemiological Screening Tool)
NICE recommend patients with psoriasis complete thePEST tool to screen for psoriatic arthritis. This involves several questions asking about joint pain, swelling, a history of arthritis and nail pitting. A high score triggers a referral to a rheumatologist.
X-ray changes in the joints for psoriatic arthritis:
- Periostitisis inflammation of the periosteum causing a thickened and irregular outline of the bone
- Ankylosisis where bones join together causing joint stiffening
- Osteolysisis the destruction of bone
- Dactylitisis inflammation of the whole digit and appears on the x-ray as soft tissue swelling
- Pencil-in-cup appearance
The classic x-ray change to the digits is the “pencil-in-cup appearance”. This is where there are central erosionsof the bone beside the joints and this causes the appearance of one bone in the joint being hollow and looking like a cup whilst the other is narrow and sits in the cup.
Management of psoriatic arthritis:
Management is similar to rheumatoid arthritis, and treatment is often coordinated between dermatologists and rheumatologists.
Depending on the severity, the patient might require NSAIDs for pain, DMARDS (methotrexate, leflunomide, or sulfasalazine), anti-TNF medications (etanercept, infliximab, or adalimumab), or ustekinumab, which is a monoclonal antibody that targets interleukin 12 and 23.
Axial sponyloarthropathy increases risk of osteoporosis.
Axial sponyloarthropathy increases risk of osteoporosis.
Axial sponyloarthropathy increases risk of osteoporosis.
Axial sponyloarthropathy increases risk of osteoporosis.
Circinate balanitis
Circinate balanitisis dermatitis of the head of the penis.
What is found on temporal artery biopsy in GCA?
Multinucleated giant cells are found on the temporal artery biopsy.
What is GCA?
Giant Cell Arteritis (GCA) is a disease that causes inflammation of the arteries, particularly those at the side of the head (the temples). It is also known as temporal arteritis.
What are the common features of GCA?
GCA usually presents with some combination of the following features in an elderly person: temporal headache, jaw claudication, amaurosis fugax, thickened, tender temporal artery, and scalp tenderness. The onset can be acute or insidious. In addition, GCA and polymyalgia rheumatica (PMR) often occur together, and so symmetrical proximal muscle weakness and an oligoarthritis may occur.
What are the potential complications of GCA?
The potential complications of GCA include permanent monocular blindness and stroke.
What investigations are necessary in suspected cases of GCA?
First line tests to order in suspected GCA are inflammatory markers (particularly ESR), FBC, and LFTS. The definitive investigation is temporal artery biopsy. If negative on the side with symptoms, the asymptomatic side may also be biopsied. If large-vessel involvement is suspected, this may be diagnosed by conventional angiography, magnetic resonance angiography, or CT scan.
How is GCA treated?
GCA should be treated immediately with high-dose steroids (60mg OD prednisolone) to prevent blindness and stroke. Once symptoms resolve, prednisolone is gradually tapered, usually over a long period of 1-2 years, because relapses can occur when tapering too quickly. If weaning off of steroids is problematic and steroid-sparing agents may be used to lower the dose such as azathioprine. Low-dose aspirin is usually also given to further reduce the risk of stroke and blindness.
What are the potential side effects of high-dose corticosteroids, and how can they be managed?
The potential side effects of high-dose corticosteroids include osteoporosis, gastric ulcers, and increased risk of infection. Bisphosphonates and proton pump inhibitors may be warranted to prevent osteoporosis and gastric ulcers.
What other medications might be used to lower the corticosteroid dose?
Steroid-sparing agents such as azathioprine may be used to lower the corticosteroid dose.
Why is low-dose aspirin usually given to patients with giant cell arteritis?
Low-dose aspirin is usually given to further reduce the risk of stroke and blindness.
What is granulomatosis with polyangiitis?
Granulomatosis with polyangiitis is an autoimmune condition associated with necrotizing granulomatous vasculitis, affecting both the upper and lower respiratory tract as well as the kidneys.
What are the features of granulomatosis with polyangiitis?
Features of granulomatosis with polyangiitis include upper respiratory tract symptoms, lower respiratory tract symptoms, and rapidly progressive glomerulonephritis. Other features may include a saddle-shape nose deformity, vasculitic rash, eye involvement, and cranial nerve lesions.
How is granulomatosis with polyangiitis managed?
Treatment for granulomatosis with polyangiitis includes steroids, cyclophosphamide, and plasma exchange. Median survival is 8-9 years.
What is the key feature of granulomatosis with polyangiitis? (in inv)
The key feature of granulomatosis with polyangiitis is low complement.
What are the classic triad of granulomatosis with polyangiitis?
The classic triad of granulomatosis with polyangiitis includes upper respiratory tract involvement, lower respiratory tract involvement, and pauci-immune glomerulonephritis.
What are the radiological features of granulomatosis with polyangiitis?
Radiological features of granulomatosis with polyangiitis include bilateral nodular and cavity infiltrates on chest X-ray.
What does palpation of the joints in active RA show?
Palpation of thesynoviumin around joints when the disease is active will give a “boggy” feeling related to the inflammation and swelling.
Imaging for kidney stones?
CT KUB
Why does rheumatoid arthritis require urgent referral?
There is a 3-6 month window where damage is reversible. After this damage is irreversible and there will be permanent deformity.
4 hand signs of RA
Z-thumb
Ulnar deviation
Swan neck
Boutonnieres deformity
What family history should be asked about when taking a rheum history?
FH of:
Arthritis
Autoimmune conditions
Psoriasis
What should be included in review of systems in a rheum history?
Skin - rashes?
Lungs?
Kidneys?
Weight loss
Temperature
Arthralgia
joint pain
Hand deformities seen in OA?
Squaring of the thumb
Bouchard’s nodes (cool to touch bony swelling).
Heberden’s nodes
How are CRP and ESR affected in connective tissue diseases?
Typically CRP may be normal but ESR is raised.
Common rheumatological inv (for OSCE):
Bedside tests: Urine dip - to look for vasculitis, nephrotic syndrome, glomerulonephritis.
Bloods: FBC, U&E’s, LFT’s, calcium, CRP, ESR. Important to do this to allow monitoring for when the patient starts taking medications. Immunology depending on the presentation.
Imaging: Plain x-ray, chest x-ray, ultrasound / mri.
Microbiolgy: Synovial fluid analysis (hot swollen joint).
What is ankylosing spondylitis?
Ankylosing spondylitis is an inflammatory condition mainly affecting the spine that causes progressive stiffness and pain.
- What is the link between ankylosing spondylitis and the HLA B27 gene?
HLA B27 is a gene that is strongly linked to AS, as about 90% of patients with AS have the HLA B27 gene. However, only around 2% of people with the gene will get AS.
What are the main presenting features of ankylosing spondylitis?
Ankylosing spondylitis can affect other organ systems causing systemic symptoms such as weight loss and fatigue, chest pain related to costovertebral and costosternal joints, enthesitis, dactylitis, anemia, anterior uveitis, aortitis, heart block, restrictive lung disease, pulmonary fibrosis, and inflammatory bowel disease.
Diagnosis of AS?
- Sacroiliitis on x-ray + 1 other ank spond feature
- HLAB27 on genetic testing + 2 ank spond features
What is the diagnostic criteria for AS?
The diagnostic criteria for AS include the presence of sacroiliitis on imaging plus one or more SpA feature, or HLA-B27 plus two or more SpA features, or acute anterior uveitis plus one SpA feature, or a first-degree relative with AS plus one SpA feature.
Management of AS for the OSCE:
Physiotherapy, exercise and mobilization, avoiding smoking, bisphosphonates to treat osteoporosis, treatment of complications.
Medical: NSAIDs (analgesic + disease modifying) steroids (only symptom control), DMARD methotrexate, anti-TNF medications such as etanercept or a monoclonal antibody against TNF such as infliximab, adalimumab, or certolizumab pegol).
Surgery is occasionally required for deformities to the spine or other joints.
What is psoriatic arthritis and what is it associated with?
Psoriatic arthritis is an inflammatory arthritis associated with psoriasis.
- What are the different patterns of psoriatic arthritis?
There are several recognized patterns of psoriatic arthritis:
- Symmetrical polyarthritis - Asymmetrical pauciarthritis - Spondylitic pattern
What are some signs and other associations of psoriatic arthritis?
Signs of psoriatic arthritis include plaques of psoriasis on the skin, pitting of the nails, onycholysis (separation of the nail from the nail bed), dactylitis (inflammation of the full finger), and enthesitis (inflammation of the entheses, which are the points of insertion of tendons into bone). Other associations include eye disease (conjunctivitis and anterior uveitis), aortitis (inflammation of the aorta), and amyloidosis.
What is reactive arthritis, and what causes it?
Reactive arthritis is a condition where synovitis occurs in the joints as a reaction to a recent infective trigger. It is sometimes referred to as Reiter Syndrome.
The most common infections that trigger reactive arthritis are gastroenteritis or sexually transmitted infections. Chlamydia is the most common sexually transmitted cause of reactive arthritis.
What are the symptoms of reactive arthritis, and how is it diagnosed?
Reactive arthritis typically causes acute monoarthritis, affecting a single joint in the lower limb, most often the knee, presenting with a warm, swollen, and painful joint. The obvious differential diagnosis is septic arthritis (infection in the joint). However, in reactive arthritis, there is no infection in the joint. Diagnosis is made by clinical presentation.
Common side effect of amlodipine in the elderly:
Ankle swelling - can lead to a prescribing cascade e.g then prescribing furosemide.
Explain what crystalloid fluids are:
- examples
Solutions of small molecules in water (e.g. sodium chloride, Hartmann’s, dextrose)
Explain what colloid fluids are:
- examples
Solutions of larger organic molecules (e.g. albumin, Gelofusine)
Which class of fluids are preferred in resuscitation and why?
Research has shown that crystalloids are superior in initial fluid resuscitation.
Colloids are used less often than crystalloid solutions as they carry a risk ofanaphylaxis.
What fluids are used specifically in fluid resuscitation?
Sodium chloride 0.9%
Hartman’s
What are the daily maintenance requirements of water?
25-30 ml/kg/day of water
What are the daily maintenance requirements of electrolytes?
Approximately 1 mmol/kg/day of potassium, sodium and chloride.