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英文誌(2004-)

Journal of Medical Ultrasonics

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1998 - Vol.25

Vol.25 No.06

Case Report(症例報告)

(0701 - 0706)

副腎偶発腫瘍として発見された腹腔内嚢種の1例

A Case of Intraperitoneal Cyst Discovered as an Adrenal Incidentaloma

山北 宜由1, 河瀬 晴彦1, 2, 村井 敏博1, 2, 宮本 康二1, 2, 3, 清水 幸雄1, 2, 4, 梅崎 実1, 3, 4, 池田 庸子1, 4

Noriyoshi YAMAKITA1, Haruhiko KAWASE1, 2, Toshihiro MURAI1, 2, Kouji MIYAMOTO1, 2, 3, Yukio SHIMIZU1, 2, 4, Minoru UMEZAKI1, 3, 4, Tsuneko IKEDA1, 4

1松波総合病院内科, 2松波総合病院外科, 3松波総合病院放射線科, 4松波総合病院病理診断部

1Department of Internal Medicine, Matsunami General Hospital, 2Department of Surgery, Matsunami General Hospital, 3Department of Radiology, Matsunami General Hospital, 4Department of Pathology, Matsunami General Hospital

キーワード : Adrenal incidentaloma, Intraperitoneal cyst, Ultrasonography, Ultrasound diagnosis, Ultrasound

A 57-year-old man with an intraperitoneal cyst was referred to this institution upon discovery of a left adrenal incidentaloma. The possibility of a functional adrenal tumor could not be ruled out endocrinologically. Ultrasonic examination showed a homogenous, solid supra-left renal tumor echo that had echogenicity similar to that of the spleen. The tumor measured 4.7 cm in diameter, and color flow imaging demonstrated no blood flow in it. Ultrasonic examination did not delineate a normal left adrenal; however, CT imaging and 131I-iodocholesterol scintigraphy suggested that the tumor originated extra-adrenally. Tumor intensity in MRI studies was lower than that of the liver in the T1-weighted image and slightly higher than that of the liver in the T2-weighted image. Laparoscopic surgery showed a round extra-adrenal cyst containing a white lardlike substance, and adhering tightly to the stomach and spleen. Formation of the cyst could conceivably be histopathologically attributable to degeneration of lipoma or encapsulation of fatty necrosis. The imaging findings of this cyst were not characteristic of a cyst. Extra care in obtaining images of tumors in the left adrenal region is necessary if the images are to shed light on tumor orign.