A 73-year-old woman was referred for a left adrenal region double tumor that had been diagnosed incidentally without symptoms. Computed tomography showed high-density ventral (28×14 mm; arrow) and low-density dorsal (25×20 mm; arrowhead) tumors (Picture 1). In-phase T1-weighted/opposed-phase T1-weighted/T2-weighted magnetic resonance imaging showed hyperintense and hypointense/no signal drop and partial suppression/intermediate and intermediate signal intensity (Picture 2). Mucous filled the ventral tumor, and pathological findings showed respiratory epithelium composing the lining, leading to a presumptive diagnosis of bronchogenic cyst (Picture 3, 4; arrows). The dorsal tumor was diagnosed as benign adrenocortical adenoma, with subclinical Cushing's syndrome diagnosed based on serum cortisol levels of 5.8 μg/dL after a 1-mg dexamethasone suppression test (Picture 3, 4; arrowheads). A retroperitoneal bronchogenic cyst, an extremely rare developmental anomaly usually found in the left adrenal region (1,2), adjacent to an adrenocortical adenoma should be considered as a differential diagnosis for a double tumor in that region.
Picture 1.
Picture 2.
Picture 3.
Picture 4.
The authors state that they have no Conflict of Interest (COI).
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