Westermark's sign, Hampton's hump, Palla's sign are all features of which condition on chest X-ray
A normal or nearly normal chest x-ray often occurs in PE. Well-established abnormalities include focal oligemia (Westermark's sign), a peripheral wedged-shaped density above the diaphragm (Hampton's hump), and an enlarged right descending pulmonary aery (Palla's sign).Harrison 19e pg: 1633
Tubercular pleural effusion
Pulmonary Embolism
Acute Pulmonary adema
Left ventricular failure
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