Rheumatology Flashcards
Reactive arthritis triad
classically presents as part of a triad including urethritis, conjunctivitis, and arthritis (though not all features need to be present)
keratoderma blennorrhagicum
keratoderma blennorrhagicum on the soles of his feet - a waxy yellow rash pathognomonic for reactive arthriti
Dermatomyositis antibodies
ANA most common, anti-Mi-2 most specific
DerMI-2myositis.
Anti-scl-70 antibodies
associated with systemic sclerosis (scleroderma)
Anti-Jo-1 antibodies,
idiopathic inflammatory myopathies, particularly polymyositis
Anti-centromere bodies
limited cutaneous systemic sclerosis (also known as CREST syndrome: Calcinosis, Raynaud’s phenomenon, Esophageal dysmotility, Sclerodactyly and Telangiectasia)
cytokines is the most important in the pathophysiology of rheumatoid arthritis?
TNF alpha
Leflunomide
Leflunomide is a disease modifying anti-rheumatic drug (DMARD) mainly used in the management of rheumatoid arthritis. It has a very long half-life which should be remembered considering it’s teratogenic potential
McArdle’s disease
McArdle’s disease is a phenotypically mild glycogen storage disorder that presents in late adolescence or early adulthood with exertional rhabdomyolysis with a textbook ‘second wind phenomenon’, in which patients develop muscle cramps and fatigue with subsequent recovery with continued exercise. The description of the patient’s muscle cramping that spontaneously resolves during the race harkens to this second wind phenomenon.
MMF MoA
inhibits inosine monophosphate dehydrogenase, which is needed for purine synthesis
as T and B cells are particularly dependent on this pathway it can reduce the proliferation of immune cells
Reactive arthritis is associated with which one of the following HLA antigens
HLA b27
HLA-A3:
Hemochromatosis, Myasthenia Gravis
HLA-DR4:
Rheumatoid Arthritis
HLA-B51:
Behcet’s disease
B51 = Behcet = Be5ce1
HLA-DR3:
SSLE
early-onset Myasthenia Gravis, Hashimoto’s thyroiditis, primary sclerosing chloangitis
And also HLA DR3 associated with
dermatitis herpetiformis
Sjogren’s syndrome
primary biliary cirrhosis
What is the most common target of pANCA
Myeloperoxidase is a neutrophil protein whose primary role is the generation of oxygen free radicals.
What is the most common target of cANCA
Serine proteinase 3 (PR3)
treatment of choice for SLE
Hydroxychloroquine
Typical findings of AION on fundoscopy
a swollen, pale optic disc with blurred margins. This is a sight-threatening condition and requires immediate admission and treatment with high-dose corticosteroids.
underlying malignancies associated with dermatomyositis
typically ovarian, breast and lung cancer
Anti-dsDNA antibodies are associated
systemic lupus erythematosus (SLE)
Circinate balanitis
Circinate balanitis is a well-documented mucocutaneous manifestation of reactive arthritis, particularly in male patients. It presents as serpiginous white plaques on the glans penis and is considered highly characteristic of the condition
Denosumab
RANK ligand inhibitor for secondary prevention of osteoporosis.
neonatal lupus erythematosu
can result from maternal autoantibodies crossing the placenta. It is strongly associated with anti-SSA/Ro antibodies and complications commonly include congenital heart block, skin rashes and hepatosplenomegaly
Ro Ro Ro your boat gently (ie. slowly for CHB) down the spleen
megaly megaly megaly megaly, lupus is but a dream
Collagen defect in classical ehlers danlos
vascular - type 3 collagen, classical - type 4 collagen
Collagen types
1 is in bONE
2 is in carTWOlage (catilage)
3 vEssEls
4 is in the floor, that is basement membranes of lungs an
What serum marker shows active disease in SLE and can be used for monitoring active disease?
Complement levels - low in active disease
ESR is generally used
High anti-dsDNA antibody levels typically suggest active disease in SLE.
HLA B8
Grave’s disease.
polyarteritis nodosa antibodies
Perinuclear-antineutrophil cytoplasmic antibodies (pANCA)
Polyarteritis nodosa (PAN) is a vasculitis affecting medium-sized arteries with necrotizing inflammation leading to aneurysm formation. PAN is more common in middle-aged men and is associated with hepatitis B infection.