title: (18)F-FDG PET/CT Imaging of Primary Hepatic Neuroendocrine Tumor.
abstract: Primary hepatic neuroendocrine tumors (PHNETs) are extremely rare neoplasms. Herein, we report a case of a 70- year-old man with a hepatic mass. The non-contrast computed tomography (CT) image showed a low-density mass, and dynamic CT images indicated the enhancement of the mass in the arterial phase and early washout in the late phase. F-18 fluorodeoxyglucose ((18)F-FDG) positron emission tomography (PET) and fused PET/CT images showed increased uptake in the hepatic mass. Whole-body (18)F-FDG PET images showed no abnormal activity except for the liver lesion. Presence of an extrahepatic tumor was also ruled out by performing upper gastrointestinal endoscopy, total colonoscopy, and chest and abdominal CT. A posterior segmentectomy was performed, and histologic examination confirmed a neuroendocrine tumor (grade 1). The patient was followed up for about 2 years after the resection, and no extrahepatic lesions were radiologically found. Therefore, the patient was diagnosed with PHNET. To the best of our knowledge, no previous case of PHNET have been detected by (18)F-FDG PET imaging.
authors.affiliation: Department of Radiology, Faculty of Medicine, Kagawa University, Kagawa, Japan.
authors.forename: Katsuya
authors.initials: K
authors.lastname: Mitamura
authors.affiliation: Department of Radiology, Faculty of Medicine, Kagawa University, Kagawa, Japan.
authors.forename: Yuka
authors.initials: Y
authors.lastname: Yamamoto
authors.affiliation: Department of Radiology, Faculty of Medicine, Kagawa University, Kagawa, Japan.
authors.forename: Kenichi
authors.initials: K
authors.lastname: Tanaka
authors.affiliation: Department of Radiology, Faculty of Medicine, Kagawa University, Kagawa, Japan.
authors.forename: Takayuki
authors.initials: T
authors.lastname: Sanomura
authors.affiliation: Department of Radiology, Faculty of Medicine, Kagawa University, Kagawa, Japan.
authors.forename: Makiko
authors.initials: M
authors.lastname: Murota
authors.affiliation: Department of Radiology, Faculty of Medicine, Kagawa University, Kagawa, Japan.
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Nishiyama
keywords: 18F-FDG; Neuroendocrine tumor; PET; Primary hepatic neuroendocrine tumor