Primary non-Hodgkin's lymphoma of the liver.

Primary non-Hodgkin's lymphoma of the liver is an extremely rare lymphoma subset that often presents with diagnostic difficulties to both clinicians and pathologists. Using MEDLINE search, 90 cases of primary hepatic lymphomas reported in the literature were reviewed. The epidemiology and etiology, clinical presentation, pathologic features, management, and outcome of these patients have been summarized and described. Results of this review show that middle-aged males are most often affected. Abdominal pain or discomfort, weight loss and fever are the most frequent presenting symptoms. Most cases have a solitary or multiple mass lesions in the liver, and are frequently misdiagnosed as having a primary liver tumor or metastatic cancer. Diffuse large cell lymphoma is the most commonly encountered histologic subtype. Surgery, chemotherapy and radiotherapy have been used alone or in combination as treatment but the outcome is generally poor. Although primary hepatic lymphoma is an aggressive disease, it is resectable, and responsive to chemotherapy and radiotherapy. Because of the profound therapeutic implications, it should be considered in the differential diagnosis for patients presenting with mass lesions in the liver or hepatic disease.