Rheumatology Flashcards
What Crystal is deposited in the synovium to cause gout
Monosodium urate monohydrate
What deficiency leads to lesch nyhan syndrome
HGPRTase deficiency
What is the MOA of colchicine
Inhibits microtubule polymerisation and neutrophil motility
What is deposited in the synovium to cause pseudogout
calcium pyrophosphate dihydrate
What are the risk factors for pseudogout
Wilson’s, haemochromatosis, hyperparathyroidism, hypothyroidism, acromegaly, low Mg, low PO4
Which GU infection is most linked with reactive arthritis
Chlamydia
What presentation characterises gonococcal arthritis
Dermatitis-polyarthritis-tenosynovitis syndrome
What is rheumatoid factor
IgM antibody against Fc portion of IgG
What are the early X-ray findings of rheumatoid arthritis
Periarticular osteopenia, osteoporosis and decalcification
What is the MOA of tocilizumab
Anti-IL6 receptor
Which monoclonal antibody acts on CD20 to result in B cell depletion
Rituximab
What is felty’s syndrome
Active RA + splenomegaly + low WCC
Which drug inhibits dihydrofolate reductase
Methotrexate
Which cancer has an increased risk associated with Sjögren’s syndrome
Non Hodgkin’s lymphoma
What is the main risk associated with hydroxychloroquine
Retinopathy
Which blood markers are positive in Sjögren’s syndrome
RF, ANA, Anti-Ro, Anti-La
How is ankylosing spondylitis diagnosed and monitored
Plain XRay of sacroiliac joints
What is the MOA of Ustekinumab
IgG1k monoclonal antibody to IL12/23
What condition causes a salmon-coloured rash and swinging pyrexia?
Adult onset stills disease
Which drug can cause 6-MP toxicity when given with azathioprine?
Allopurinol
What is the main risk associated with hydroxychloroquine?
Retinopathy (bull’s eye appearance on fundoscopy, visual field defects)
Which autoimmune condition increases the risk of non Hodgkin’s lymphoma
Sjorgrens
How is sjorgrens syndrome diagnosed
Schirmers test (<5mm in 5 mins)
What is the most common type of psoriatic arthritis
Symmetrical polyarthritis
Which particular biomarker is characteristically increased in adult onset stills disease
ferritin
Which antibodies are most specific for SLE
Anti-dsDNA, Anti-Smith
Which antibody is increased in 95% of drug induced lupus cases?
Anti-histone antibodies
What are the two drugs that commonly cause drug induced lupus
Hydralazine, procainamide
What blood tests are characteristic of antiphospholipid syndrome
Raised APTT, normal PT, low Platelets
Which antibody tests are diagnostic of antiphospholipid syndrome
Anticardiolipin antibodies, lupus anticoagulant
What is seen on biopsy in polyarteritis nodosa
Necrotising inflammation (fibrinoid necrosis appearance)
Which small-medium vasculitic disease seen in smokers spares coronary arteries but can lead to gangrene of the digits
Thromboangitis obliterans
Which vasculitis is associated with hepatitis B
Polyarteritis nodosa
Which vasculitis can cause livedo reticularis and testicular pain
Polyarteritis nodosa
What test is specific for Behçet’s disease
Positive pathergy test
Which antibodies are related to cANCA
Anti-proteinase 3 Abs
Which antibodies are associated with pANCA
Myeloperoxidase Abs
Which valvular disease is seen in Takayasu’s arteritis
Aortic regurgitation
Which vasculitis is hepatitis C associated with
Type II cryoglobulinaemia
How is reynauds diagnosed
Nail fold capillaroscopy
What is the underlying mechanism of systemic sclerosis
Increased fibroblast activity and fibrosis
Which antibody is seen in 90% of localised scleroderma (morphea)
Anti-cu/zn superoxide dismutase
What is the treatment of scleroderma renal crisis
Oral ACEi
What skin changes are seen in dermatomyositis
Shawl sign, heliotrope rash, gottron’s papules
Which disease is characterised by anti-RNP
Mixed connective tissue disease
What investigation is best in a patient with longstanding RA that develops proteinuria and diarrhoea
Rectal biopsy for amyloid AA deposition
What is seen on congo red staining in amyloidosis
apple green birefringence
Which disease is associated with keratoderma blenorrhagica (waxy yellow/brown papules on palms and soles)
Reactive arthritis
Which drug does sulfasalazine sometimes show cross-reactivity with
aspirin
Which feature is most commonly seen on Xray in ankylosing spondylitis
syndesmophytes
What is elevated in the urine in Paget’s disease?
urinary hydroxyproline
which joints are characteristically involved in hand osteoarthritis
Carpometacarpal and DIP joints
Which antibodies are associated with congenital heart block in SLE
Anti-Ro