Lymphoma originating in the liver is rare and few clinical cases had been reported. The imaging manifestations of primary hepatic lymphoma (PHL) were lack of specificity and diverse. The authors displayed the CT and MRI images of one patient with diffuse infiltrating PHL and made a brief description of imaging features, underlying pathophysiological mechanisms, and differential diagnoses of PHL, with the hope of strengthening the understanding of PHL for clinicians and radiologists.