1. Vascular (Vasculitis) Flashcards
Vasculitis - imaging (5)
All types look similar.
Wall thickening,
Occlusions,
Dilatations,
Aneurysm formation
Vasculitis - types (4)
Large vessel (Takayasu, Giant cell, Cogan syndrome),
Medium vessel (PAN, Kawasaki),
Small vessel ANCA + (Wegeners, Churg strauss, Microscopic polyangiitis),
Small vessel ANCA negative (HSP, Behcets, Burgers)
Takayasu Arteritis - trivia (3)
Commonest in 15-30YO Asian women.
Asian or Involving aorta is most likely takayasu.
5 types, beyond scope of FRCR, but type 3 (involving arch and abdominal aorta) is most common.
Giant cell arteritis - trivia (2)
Commonest primary system vasculitis.
Commonest in older men (70-80).
Takayasu arteritis - imaging (5)
Acute phase:
Wall thickening and enhancement.
Occlusions of major aortic branches, or dilatation of aorta and major branches.
Aortic valve often involved (stenosis or insufficiency).
Late phase:
Diffuse narrowing distally.
Peripheral pruning of pulmonary arteries.
Giant cell arteritis - features (4)
Commonly involves aorta, major branches and particularly branches of external carotid (Temporal Artery).
ESR and CRP markedly elevated.
Rx: Responds to steroids.
Gold standard for diagnosis is temporal artery biopsy (often negative)
Giant cell arteritis - imaging (2)
US: thickening of wall of temporal artery
CT/MRA/angiogram of armpit area: Wall thickening, occlusions, dilatation, aneurysms.
Cogan syndrome (4)
Rare, large vessel vasculitis affecting children and young adults.
Favours eyes, causing optic neuritis, uveitis and audiovestivular symptosm (resembles Menieres).
Can get aortitis - worse prognosis.
“kid with eye and ear symptoms +/- aortitis”
PAN - features (4)
More common in men.
Commonly affects renal (90%), cardiac (70%) and GI (50-70%).
Microaneurysm formation, mainly at branch points, followed by infarction.
Imaging: Kidneys with microaneurysms and multiple areas of wedge shaped infarct.
PAN - trivia (2)
Associated with Hep B.
Microaneurysm formation in kidneys can also be seen in people who abuse crystal meth.
Kawasaki disease
Commonest vasculitis in kids.
Common cause of coronary artery aneurysm (Calcified coronary artery aneurysm on CXR is an aunt minnie).
Other buzzwords
“Mucocotaneous lymph node syndrome”
“Fever for 5 days”
Coronary artery aneurysms - prognosis (2)
> 8mm are Giant, prone to poor outcomes including MI
<8mm may regress
Wegeners (Granulomatosis with Polyangiitis) - (3)
Affects upper resp tract (sinuses), lower resp tract (lungs) and kidneys.
cANCA + (90%).
Imaging: nasal perforation and cavitating lung lesions.
Churg strauss - (5)
Necrotising pulmonary vasculitis, within spectrum of eosinophilic lung disease.
Always have asthma and eosinophilia.
Imaging: Transient peripheral consolidation or ground glass.
Cavitation is rare (think Wegeners instead).
pANCA + (75%)
Microscopic polyangiitis - (3)
Affects kidneys and lungs.
1/3 get diffuse pulmonary haemorrhage.
pANCA + (80%)