FDG‐PETで集積を認め悪性が疑われた後腹膜発生Castleman’s diseaseの1例

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  • Castleman's Disease of the Retroperitoneum Showing High Accumulation on FDG-PET Scan; Report of a Case

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A 60-year-old woman referred for examination of a retroperitoneal tumor was found in contrast-enhanced CT to have an enhanced, relatively demarcated mass with a small cyst in the retroperitoneal space. F-18 fluorodeoxyglucose positron emission tomography (FDG-PET) showed high accumulation in the tumor. Neuronspecific enolase was 36.0ng/ml, the normal range being less than 10.0ng/ml, necessitating surgery for suspected retroperitoneal malignancy. The resected 77×24mm tumor proved histopathologically to be hyalinevascular Castleman's disease. The postoperative course was uneventful and she has shown no signs of recurrence. Castleman's disease is a relatively rare disorder characterized by the benign proliferation of lymphoid tissue. It is difficult to differentiate malignant retroperitoneal tumor and Castleman's disease because both are positive in FDG-PET.

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