Coruh AG, Kul M, Oz DK, et al. - Researchers examined 90 solid pulmonary nodules (43 carcinoids and 47 hamartomas) in 90 individuals to ascertain whether the CT features might be used in distinguishing pulmonary carcinoids from hamartomas. They examined the following CT scan features: size, location (peripheral/central), contour (lobulated/nodular), number of lobulation, attenuation, calcification, endobronchial status, bronchial extension and involvement, parenchymal abnormalities distal to the lesion e.g. hyperlucency, atelectasis, and nodularity. By evaluation of histopathological specimens, the final pathologic diagnosis of the lesions and bronchial extension were confirmed. This is the first study on discrimination of carcinoids and hamartomas. To differentiate carcinoids from hamartomas, a new CT sign called “bronchial triangle sign” might be applied. Compared with hamartomas, distal parenchymal abnormalities are more common in carcinoids.