Palla's sign,1 dilated right descending pulmonary artery >16 mm, and the Westermark's sign,2 focal oligaemia, are useful chest x-ray signs of pulmonary thromboembolism (PTE) even though their sensitivity and specificity are less. Here, we present a case in which PTE was suspected based on these chest x-ray signs.

A 35-year-old male with fever, right thigh pain, breathlessness and cough was considered to have community-acquired pneumonia, and received intravenous antibiotics for 2 days …