PMC4895065_01
50-year-old woman with peripheral carcinoid tumor. Chest radiograph shows a right pericardiac mass.
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During her evaluation a chest mass was present on radiography (Fig. 1A), but its encapsulated appearance and low attenuation on initial computed tomography (CT) of the thorax (not shown) was thought to represent a pericardial cyst. A second CT scan (Fig. 1B) revealed that the right middle lobe mass had an attenuation of 40 Hounsfield units (HU) in the arterial phase, 61 HU in the venous phase, and 51 HU in the delayed equilibrium phase. An Indium-111 octreotide scan (Fig. 1C), performed after initial biopsy to further characterize the tumor, was positive for somatostatin receptor activity limited to the pericardiac mass.