庄司 功¹, 八巻 倫子¹, 丹治 広彰¹, 椎名 正明¹, 小林 千晶¹, 石幡 良一¹, 佐藤 佳浩¹, 宍戸 牧子², 猪狩 弘之¹

Isao SHOJI¹, Michiko YAMAKI¹, Hiroaki TANJI¹, Masaaki SHIINA¹, Chiaki KOBAYASHI¹, Rhoichi ISHIHATA¹, Yoshihiro SATOH¹, Makiko SlSIDO², Hiroyuki IGARI¹

¹大原綜合病院胃腸科, ²大原綜合病院内科

¹Division of Gastroenterology Ohara General Hospital, ²Division of Internal Medicine Ohara General Hospital

キーワード : Lymphangioma, Lymphoscintigraphy, Magnetic resonance imaging (MRI), Retroperitoneal tumor, Ultrasonography

An 18-year-old man was referred to this institution with complaints of general fatigue and facial edema. Results of laboratory tests on admission indicated hypoproteinemia, hyperlipidemia, proteinuria, and hematuria. Ultrasonographic (US), computed tomographic (CT), and magnetic resonance imaging (MRI) studies showed a polycystic tumor in the retroperitoneum. The tumor encircled the abdominal aorta and inferior vena cava and caused lateral deviation of the right ureter. No invasive tumor growth toward other retroperitoneal organs was observed, however. Lymphoscintigraphy led to a diagnoses of retroperitoneal cystic lymphangioma. Surgical treatment was thus mandatory.