Adrenal cyst: A review of the Japanese literature and report of a case

Adrenal cysts are a rare condition and are usually non-functioning and asym ptomatic. A 44-year-old man was referred from another hospital because a le ft retroperitoneal tumor was incidentally found by abdominal echography. La boratory findings including adrenal hormonal study were within the normal r ange. It showed homogeneously low intensity on T-1-weighted images and high intensity on T-2-weighted images on magnetic resonance imaging (MRI). Angi ography demonstrated that the tumor was avascular and of left adrenal origi n. The patient was diagnosed with left adrenal cyst and was intensively fol lowed up with plans for examination with diagnostic imaging.