A case and review of pulmonary MALT lymphoma showing accumulation on FDG-PET

Abstract

A 75-year-old woman was admitted to our hospital for evaluation of an abnormal shadow found incidentally in the right upper lobe on chest CT. ¹⁸F-Fluorodeoxyglucose positron emission tomography (FDG-PET) revealed accumulation in the mass, and the standardized uptake value was 5.2, increasing on delayed scan. Right upper lobectomy was performed for the diagnosis and treatment, and the pathologic sample revealed pulmonary mucosa-associated lymphoid tissue (MALT) lymphoma. About 29 cases of pulmonary MALT lymphoma including our case have been reported with FDG-PET, and 25 of them showed accumulation. FDG-PET is sometimes useful for imaging pulmonary MALT lymphoma before and after treatment.