DSA Malaise and Generalized Pain Flashcards
What is the significance of the ration of ANA?
titer of < 1:40 is normal/negative
higher the ration = more clinically significant
What is a homogeneous staining pattern indicative of?
(entire nucleus is diffusely stained)
anti DNA, histone, or DNP
drug-induced lupus
sjogren’s syndrome
SLE
What does a speckled nuclear staining pattern mean?
anti Sm, Ro and La, Wcl-70, Jo and Mi
seen in:
Sjogren’s
Mixed CT Dz
diffuse systemic sclerosis
SLE
What does a centromere nucleus staining pattern mean?
seen in CREST
What does a nucleolar staining pattern mean?
Ab directed agains RNA
seen in SLE and diffuse systemic sclerosis
What is libman-sacks endocarditis?
seen in SLE
vegetations are microthrombi
Why do SLE pts have an increased risk of MI?
have accelerated atherosclerosis
What is significant SLE serology?
+ ANA
+ anti-ds DNA (correlate w/ dz activity)
+ Smith
decreased C3 or C4
What are the 3 types of antiphospholipid antibodies?
type 1 - causes false-positive tests for syphilis
type 2 - lupus anticoagulant
type 3 - anti-cardiolipin antibodies, directed at Beta2GPI
How do you treat antiphospholipid syndrome?
anticoagulation
continue indefinitely
What autoimmune dz can cause cotton wool spots on retina exam?
SLE/ antiphospholipid syn retinopathy
What serology do you see in a lupus-like syndrome/drug-induced lupus?
+ ANA
+ anti-histone Abs (95%, diffuse staining pattern)
What drugs can cause a lupus-like syndrome?
hydralazine
Isoniazid
minocycline
TNF inhibitors
quinidine
chlorpromazine
methyldopa
procainamide
How do sulfa drugs affect SLE?
induce a lupus flair (doesn’t cause lupus-like syndrome)
What is neonatal lupus and what is its feared complication?
affects kids of mothers w/ anti Ro or La Abs
can cause permanent complete heart block
What is the first line treatment for SLE?
avoid sun exposure
NSAIDs
corticosteroids
hydroxychloroquine
What are the main causes of death early and late in SLE?
early: infections, kidney, or CNS dz
Late: accelerated athersclerosis and MI, Thromboembolic events
What is an MSK complication of SLE managed with corticosteroids?
avascular necrosis of bone
(hips and knees most commonly)
What type of hypersensitivity is SLE?
type 3
(deposition of antigen-Ab complexes –> complement and leukocyte recruitment)
What is discoid lupus erythematosus?
variant of cutaneous lupus
can be seen alone or as a manifestation of SLE
most commonly on the head
inflammatory plaques that evolve into gross scars
How do you treat discoid lupus?
photoprotection + topical anti-inflammatory agents or systemic antimalarial drugs
(treat early to minimize scarring)
What can discoid lupus be mistaken for?
tinea infection (ring worm)
psoriasis
morphea (limited scleroderma)
What is the hallmark of scleroderma (SSc)?
thickening and hardening of the skin
micrangiopathy and fibrosis of skin and viscerlal organs
Why do ppl with scleroderma have dry, itchy skin?
there is obliteration of eccrine sweat and sebaceous glands
What are the 3 types of scleroderma?
diffuse (dcSSc)
limited (lcSSc)/ CREST
localized
What do you see in CREST syndrome/lcSSc
Cutaneous calcinosis
Raynaud’s
Esophageal dysmotility, GERD
Sclerodactaly (thickening and tightening of skin on fingers and hands)
Ttelangiectasia
*Anti-centromere Abs
*vascular probs more common than w/ dcssc, get pulmonary A Htn
what are the two phases of Diffuse cutaneous systemic sclerosis?
inflammatory edematous phase –> fibrotic phase