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Fig. 4A —53-year-old man with right upper extremity thrombosis secondary to lipoma. Sagittal true fast imaging with steady-state precession image (TR/TE, 4.8/2.3; flip angle, 70°; matrix, 134 x 256; slice thickness, 5 mm) in right hemithorax at level of mid clavicle shows large hyperintense mass (asterisk) inferior in relation to subclavian vessels. Right subclavian vein (white arrowhead) shows slightly heterogeneous high signal intensity, which is similar to other veins (black arrowhead) in the same image. However, its signal intensity is mildly decreased compared with that of right subclavian artery (arrow). Both reviewers interpreted these findings as flow artifacts with patent subclavian vein.