Fig. 2

a–c Double primary lung adenocarcinoma in a 60-year-old woman. a Radiologists stopped searching for other lesions after detecting the subsolid nodule in the tip of the right upper lobe, missing another subsolid nodule (arrows) in the posterior apical segment of the left upper lobe, above the aortic arch and next to the mediastinum. Multiplanar reformation (MPR) demonstrated that the nodule (arrow) was above the aortic arch where there was a blind area commonly encountered in image reading. d–f A 72-year-old woman affected by COVID-19. The enhanced CT presented a description of the nodule (arrows) in the right upper lobe along with the burr sign of lobes, thus prompting the consideration of lung cancer. However, the low-density filling defect in the right upper pulmonary artery, which was a sign of pulmonary artery embolism, was missed