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Extraosseous Osteosarcoma of the Liver Demonstrated on 18F-FDG PET/CT Imaging
Lei Jiang1, Lijuan Luan, Hong Yun
1From the *Department of Nuclear Medicine, Zhongshan Hospital, Fudan University; †Nuclear Medicine Institute of Fudan University; ‡Shanghai Institute of Medical Imaging; and Departments of §Pathology and ∥Radiology, Zhongshan Hospital, Fudan University, Shanghai, China.
Abstract:
A 66-year-old woman presented with abdominal pain for 1 month. Ultrasonography displayed multiple hepatic masses that were thought as metastases. FDG PET/CT was performed to assess the nature of these masses and to search primary malignancy. The images showed elevated FDG activity in the partially calcified hypodense lesions in the liver without abnormality elsewhere. The lesions were subsequently confirmed as primary extraosseous osteosarcoma in the liver. The patient received liver transplantation. Six months later, her CA-125 was significantly increased. The follow-up PET/CT scan demonstrated the widespread metastases.
