<prompt> Westermarks sign, Hamptons hump, Pallas sign are all features of which condition on chest X-rayTubercular pleural effusionPulmonary EmbolismAcute Pulmonary ademaLeft ventricular failure  <response>: A normal or nearly normal chest x-ray often occurs in PE. Well-established abnormalities include focal oligemia Westermarks sign, a peripheral wedged-shaped density above the diaphragm Hamptons hump, and an enlarged right descending pulmonary aery Pallas sign.Harrison 19e pg: 1633 