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Fig. 3B. —"High-riding" superior pericardial recess in 67-year-old woman with history of right lower lobectomy for lung cancer. Contiguous CT scans (8-mm collimation) obtained 2 years after surgery show slightly enlarged right paratracheal lesion (arrows, B), which was incorrectly presumed to be metastatic lymphadenopathy. Patient refused mediastinoscopy and received radiation therapy to area. Lesion had not changed in size on follow-up CT scans (not shown). In retrospect, lesion has typical features of high-riding superior pericardial recess including connection between high-riding (arrows, B) and inferior (arrowhead, C) portions of superior pericardial recess. Note also absence of pericardial effusion.