Typical carcinoid tumor presenting as a RML nodule

Axial noncontrasted CT image of a typical bronchial carcinoid involving the right middle lobe (RML). The image on the left, which was obtained with lung-window settings, shows a lobulated nodule in the RML (arrow). The image on the right depicts this mass with mediastinal soft-tissue-window settings, which shows that the nodule is soft tissue density without any calcification and therefore indeterminate.