Primary Spleen Angiosarcoma With Concomitant Hepatic Hemangiomas on 18F-FDG PET/CT

A staging FDG PET/CT was performed for a 43-year-old woman who was suspected to have splenic malignancy with multiple hepatic metastases revealed on CT images. The PET/CT images showed the masses and nodules of spleen had mildly increased uptake of FDG, whereas the uptake by the hepatic lesions was slightly higher. However, the pathologic evaluation demonstrated that splenic lesion was malignant as angiosarcoma, but the hepatic lesions were benign as hemangiomas.