FDG-PET/CTで発見された心膜原発脱分化型脂肪肉腫の1例

Primary Pericardial Dedifferentiated Liposarcoma Detected by Fluorodeoxyglucose Positron Emission Tomography/Computed Tomography；Report of a Case

はじめに　心臓原発腫瘍はまれであるが，なかでも心膜原発となるとさらにまれである．われわれはFDG-PET/CTで発見された心膜原発の脱分化型脂肪肉腫に対し，外科的治療を行った1例を経験したので報告する．

We herein present a rare case of dedifferentiated liposarcoma originating from the pericardium. A 79-year-old female was referred to our hospital with a pericardial tumor detected by fluorodeoxyglucose positron emission tomography/computed tomography （FDG-PET/CT）. The tumor, 80×48 mm in size, showed increased uptake of fluorodeoxyglucose on the FDG-PET/CT without any evidence of metastasis. The tumor was resected with the pericardium, and a histopathological examination confirmed the diagnosis of dedifferentiated liposarcoma. Additional chemotherapy, radiation therapy, or a combination of both were offered but refused by the patient. Although the patient was discharged without any complications, the tumor recurred locally 2 months after the surgery, and the patient succumbed 15 months later. The FDG-PET/CT was useful not only in detecting this malignant tumor but also in diagnosing its malignant nature.