Nils Johan Hugo Westermark (1892 – 1980) was a Swedish radiologist. Westermark sign (1938) of relative oligemia on CXR in pulmonary embolism
Eponymictionary
Fleischner sign
Fleischner sign: prominent dilated central pulmonary artery. Enlargement can be associated with massive embolus enlarging the luminal diameter of the proximal artery in the acute setting; or pulmonary hypertension in the subacute to chronic setting
Palla sign
Palla sign (1983) right descending pulmonary artery enlargement and ‘sausage-shaped’ appearance as a potential sign of pulmonary embolism on chest XR
Hampton hump
The Hampton hump is a well-defined pulmonary pleural based opacity representing hemorrhage and necrotic lung tissue in a region of pulmonary infarction caused by acute pulmonary embolism.
Chang sign
Chang sign (1965) Dilated descending pulmonary artery associated with pulmonary infarction and pulmonary hypertension following pulmonary embolism
Just Read the Map
John Snow (1813-1858) was one of the first anaesthetists – he even chloroformed Queen Victoria! – but today he is famous for his investigation of the 1854 Broad Street cholera outbreak in Soho, London. By mapping the cases of cholera he was able to link transmission of the illness to contaminated water consumed from the […]
Lincoln sign
Lincoln sign refers to forceful popliteal artery pulsation secondary to aortic regurgitation; exaggerated when the patient sits with legs crossed; and deemed positive if the elevated foot bobs up and down with each systolic contraction.
Guillain–Barré syndrome
Guillain-Barré syndrome is the most common and severe acute inflammatory paralytic neuropathy. The classical description of GBS involves rapidly progressive bilateral weakness, usually starting in the distal lower extremities and ascending proximally.
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