Adrenal cysts: imaging and percutaneous aspiration.

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Abstract
Six patients with primary adrenal cysts were encountered during a period of 3 years. Multiple imaging modalities were used to characterize these lesions, including magnetic resonance imaging in one case. Percutaneous aspiration was performed on four of the six cysts - in one case, in the operating room prior to excision of the cyst. Cholesterol was detected in four cysts and cortisol in one cyst. Cytologic findings from aspiration biopsy were benign in all five cases. Two cysts were removed, one of them after reaccumulation of the fluid after needle aspiration. The findings in this small series of adrenal cysts suggest that in certain cases, complete cyst aspiration, rather than surgical excision, may be carried out initially for diagnosis and management of indeterminate suprarenal cystic lesions and symptomatic cysts of the adrenal gland.