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in chest radiography, decreased lung markings from oligemia caused by pulmonary embolism.
Westermark signAn abrupt radiologic 'cutoff' in pulmonary vessels seen in a standard AP CXR in PE without infarction, often accompanied by dilation of vessels before the cutoff–eg, the right descending pulmonary artery. Cf Hampton sign.
Wes·ter·mark sign(ves'ter-mahrk sīn)
In chest radiography, decreased lung markings from oligemia caused by pulmonary embolism.
An abnormal x-ray finding in pulmonary embolism. It consists of diminished vascular markings distal to the clot in combination with unusually prominent vessels proximal to it.