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Fig. 1B. —35-year-old woman with history of lymphangioleiomyomatosis and prior resection of right renal—retroperitoneal angiomyolipoma presented with intermittent palpitations and tachycardia. Axial T1-weighted conventional spin-echo image (TR/TE, 577/14) at level of aortic hiatus shows that mass (M) extends from periceliac location in retroperitoneum posteriorly through diaphragmatic crura (large arrow) into retrocrural space and posterior mediastinum (small arrow). Mass is predominantly high in signal intensity but is hypointense relative to subcutaneous fat and retroperitoneal fat (F) with scattered low-signal-intensity internal septations.