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Fig. 1A. —"High-riding" superior pericardial recess in 67-year-old woman with history of tuberculosis in right upper lobe. Contiguous chest CT scans (3-mm collimation) show triangular water-attenuation lesion (solid arrows, A and B) in right paratracheal area above aortic arch, extending to inferior portion of superior pericardial recess in typical location (open arrow, C). Note that lesion is molded by adjacent vascular structures. Attenuation of lesion (asterisk, A) measured 15 H. We saw no evidence of pericardial effusion on caudal scans (not shown).