(A) T2 weighted TSE transverse image demonstrates a large, hyperintense cystic mass with polypoid solid components, displacing middle-line structures, including trachea and esophagus, to the right. The left common carotid artery is in contact with the medial wall of the lesion. Smaller lesions with similar internal structure can also be detected at the posterosuperior and left posterolateral sides. (B). T1 weighted SE transverse image demonstrates spontaneous hyperintensity in the primary lesion, consistent with intralesional hemorrhage or proteinaceous material. Papillary vegetations are isointense. The smaller posterior components are hypointense with isointense solid vegetations. (C). Contrast enhanced T1 weighted SE transverse image demonstrates heterogeneous enhancement at the papillary components.