title: CT, MRI, and 18F-FDG PET/CT Findings in Untreated Pulmonary and Hepatic B-Cell Lymphoma of Mucosa-Associated Lymphoid Tissue (MALT) Over a Five-Year Period: A Case Report.
abstract: Imaging findings of hepatic lymphoma of mucosa-associated lymphoid tissue (MALT) have been rarely reported before. We present the computed tomography (CT), magnetic resonance imaging (MRI), and fluorine-18-fluorodeoxyglucose (F-FDG) positron emission tomography (PET)/CT findings in a patient with untreated pulmonary and hepatic MALT lymphoma over a 5-year period.On the 1st abdominal MRI scan, the hepatic MALT lymphoma showed multiple hepatic subcapsular masses. On FDG PET/CT, these hepatic tumors showed hypodenisty with FDG uptake similar to the liver on early PET images, and higher than liver on delayed PET images. The patient declined to undergo treatment. Fiver year later, the follow-up MRI and FDG PET/CT showed enlargement and confluence of the hepatic tumors with higher FDG uptake than before. The enlarged hepatic tumors had minimal mass effect. In the hepatic lesions, the blood vessels and bile ducts had no distortion or displacement.The hepatic MALT lymphoma should be taken into consideration when the hepatic tumors have minimal mass effect with the intrahepatic blood vessels and bile ducts normally passing through the tumors. Delayed-time-point FDG PET/CT imaging may be helpful for improving detectability of the hepatic MALT lymphoma.
authors.affiliation: From the Department of Nuclear Medicine (AD,CZ), Changhai Hospital, Second Military Medical University; Department of Radiology (ZX), Tongren Hospital, Shanghai Jiao Tong University School of Medicine; and Department of Hematology (JY), Changhai Hospital, Second Military Medical University, Shanghai, China.
authors.forename: Aisheng
authors.initials: A
authors.lastname: Dong
authors.forename: Zhengguang
authors.initials: Z
authors.lastname: Xiao
authors.forename: Jianmin
authors.initials: J
authors.lastname: Yang
authors.forename: Changjing
authors.initials: C
authors.lastname: Zuo
mesh_terms: D005260:Female; D019788:Fluorodeoxyglucose F18; D006801:Humans; D008113:Liver Neoplasms / Q000175:diagnosis*; D008175:Lung Neoplasms / Q000175:diagnosis*; D018442:Lymphoma, B-Cell, Marginal Zone / Q000175:diagnosis*; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D064847:Multimodal Imaging; D049268:Positron-Emission Tomography; D019275:Radiopharmaceuticals; D013997:Time Factors; D014057:Tomography, X-Ray Computed
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18