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In chest radiography, the Westermark sign is a sign that represents a focus of oligemia (hypovolemia) (leading to collapse of vessel) seen distal to a pulmonary embolism (PE). [1] While the chest x-ray is normal in the majority of PE cases, [ 2 ] the Westermark sign is seen in 2% of patients.
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Westermark sign: Nils Westermark: pulmonology: pulmonary embolism: Area of oligaemia on chest x-ray Whipple's triad: Allen Whipple: endocrinology: hypoglycemia: 1.symptoms associated with hypoglycaemia 2. measured low serum glucose 3. relief of symptoms with administration of glucose p.o. or iv Wickham's striae: Louis Frédéric Wickham ...
Hampton's hump along with Westermark sign may aid in the diagnosis of pulmonary embolism, although they are rare and their sensitivities and interoperator reliabilities are low. If the sign is present in an image, there is a high chance that the person has a pulmonary embolism, but when the sign is absent a pulmonary embolism is not ruled out.
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Nils Westermark. Nils Johan Hugo Westermark (September 9, 1892 – January 24, 1980) was a Swedish sailor who competed in the 1912 Summer Olympics. He later became a radiologist, and described the Westermark sign. [1] He was a crew member of the Swedish boat Sans Atout, which won the silver medal in the 8 metre class. [2]
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