Rheumatology Flashcards
what is the most suggestive XR change of RA?
periarticular osteopaenia
which rheum condition has the lowest rates of infections related to TNF-i?
Ank spond
what medication should be avoided in an acute exacerbation of PsA?
Prednisolone
Radiology of RA
corner erosions, peri-articular osteoporosis, loss of joint space, DIPs spared
Radiology of OA
Joint space loss, sclerosis, osteophytes, subchondral cysts, ‘seagull’ in DIP
Radiology of haemachromatosis
OA changes of MCPs, esp 2nd/3rd
CPPD distribution
radiocarpal, patellofemoral
Radiology gout
punched out holes w. preserved cortex (intraosseous); inside capsule (destructive to joint), tophi
Psoriatic arthritis radiology
DIPs- pencil in cup. Mouse ear erosions, fusion of DIPs
Ank Spond radiology
romanus lesion, shiny corner sign, syndesmophytes, SIJ-ilitis
Felty’s syndrome
RA, splenomegaly, neutropaenia, leg ulcers
2 main MSK sites to get inflamed in RA other than joints (synovitis)
tenosynovitis, osteitis
Drug that accelerates RA nodules
methotrexate
HLA group for RA
DRB10404
Why is smoking a trigger for RA?
results in citrullinated peptides via PAD
Why is periodontitis a trigger for RA?
P. gingivalis has PAD
RA vasculitis typically found where?
Nailfolds
Main spinal issue in RA
atlantoaxial subluxation
RA poor prognostic features
extra-articular features, female, high titre RF/anti-CCP, later age of onset, more joints, imaging changes
Main SE of Leflunomide
Diarrhoea
Leflunomide MOA
Inhibits DHODH, purine synthesis
Above which dose of glucocorticoid does mortality increase?
8mg/day
Best TNFi for pregnancy
Certolizumab
Main viral infection that mimics RA
Parvovirus
What is Anti-centromere Ab protective for?
ILD
What 2 things is anti-RNA Pol III assoc. w. ?
Renal crisis, malignancy
2 drugs assoc. w. SScl renal crisis
Prednisolone, cyclosporin
3x XR features of SSc
Acro-osteolysis, calcinosis, pulp atrophy
Primary cause of death in SScl
Lung disease
Most common pattern of ILD in SScl
NSIP
Two drugs for SScl ILD
MMF or cyclophosphamide
G1 pHTN is similar in both, but slightly more common in…
Limited cutaneous Sscl
Cardiac MRI findings in SScl
delayed gad enhancement (Gad gets trapped in fibrosis)
Which myositis gives perivascular inflammation on biopsy?
DM
Which myositis gives degenerating and regenerating fibres, ghost cells and necrosis on biopsy?
IMNM
Which myositis gives muscle focused inflammation on biopsy
PM
Myositis assoc. w. Anti-SRP and HMGCR
IMNM
Myositis assoc. w. Anti-Jo1
Anti-synthetase
Myositis assoc. w. TIF1gamma
DM
Myositis assoc. w. Anti-NXP2
DM
Myositis assoc. w. Anti-cN1a
IBM
Anti-MDA5 gives…
Amyopathic DM with a rapidly progressive ILD
4 key parts of anti-synthetase syndrome
Myositis, ILD, mechanic’s hands, fever
Typical ILD pattern of anti-synthetase syndrome
Mostly NSIP or organising pneumonia, but can get UIP
Association of ALL forms of spondyloarthropathies
HLA-B27
csDMARds used in periphal SpA
MTx, sulfasalazine, leflunomide
If uveitis or IBD flavour to SpA use
Direct TNF-alpha inhibitors (No etanercept)
Two MAB classes used in SpAs
TNF, IL-17
Sacroilitis x3 XR changes
sclerosis, erosions, ankylosis
DISH XR changes
chunky osteophytes, no sacroiliitis
Most common infectious trigger of reactive arthritis
C. trachomatis
Iatrogenic related trigger of reactive arthritis
Intravesical BCG
2 key skin manifestations of reactive arthritis
EN and keratoderma blennorhagicum
What proportion of PsA partients are HLA B27 +ve?
1/3rd
What infection can cause a severe worsening of psoriasis/ can trigger onset in PsA?
HIV
Medications that can worsen psoriasis
Steroids, TNF-alpha
Best DMARD for peripheral arthritis of PsA
MTx
Skin’ nail sign most predictive of PsA
pitting
Which antibodies are likely to be present in CNS lupus?
ANti-Sm
Key difference between Jaccoud’s and RA
Non-erosive, correctable
Anti-Sm associations
SLE renal and neurological
Anti-DFS70 significance
Negative predictor of SLE
Biggest predictor of morality in SLE
renal lupus
Belimumab MOA
Inhibits BLyS
Best DMARD for SLE Renal vs. Joint
MMF vs. MTx
3 obstetric criteria APLS
1 fetal death >10 weeks, 3 spont abortions <10 weeks, 1 premature birth <34 weeks
Test for lupus anticoagulant
dliute russel viper test
Classic Ab at highest risk of thrombosis
lupus anticoagulant
New Ab which gives the highest thrombotic risk in APLS
B2 glycoprotein DOMAIN 1 Ab
Who should get primary prophylaxis in APLS
Triple +ve; SLE and any Ab
Mgmt of arterial embolism in APLS
Aspirin and Warfarin
Maintenance rx for AAV
steroids and AZA
Is PO or IV cyclophosphamide better in AAV?
PO because less relapse
Target for urate in gout
tophi <0.3, non-tophaceous 0.36
Avacopan MOA
C5a inhibitor
Biopsying which 2 sites is rarely useful in AAV
skin and nasal mucosa
Key cell type in GCA
CD4+