Lymphoproliferative disorders after liver transplantation: imaging features

Background: To define the imaging features of lymphoproliferative disorders that occur after liver transplantation. Methods: A retrospective review of 605 liver transplantations between 1985 and 1998 showed 20 patients with posttransplantation lymphoproliferative di sorders (PTLDs). All relevant clinical, imaging, and pathologic findings we re reviewed. Results: PTLDs occurred in 13 men and seven women (mean age = 43.3 years, a ge range = 18-68 years). The time to diagnosis of disease ranged from 1.5 t o 51 months (mean = 14 months) posttransplantation. Cervical, thoracic, or abdominal lymphadenopathy was seen in II patients (55%). A complex portal m ass in five patients (25%) was the second most common manifestation of PTLD , ranging in size from 5 to 12 cm. Other findings included gastrointestinal tract involvement in three patients (15%) seen as a duodenal mass and diff use wall thickening in one patient and large bowel thickening in two patien ts with preexisting inflammatory bowel disease. Conclusion: There is a wide spectrum of findings in lymphoproliferative dis order after liver transplantation. The presence of lymphadenopathy, a porta l mass, or bowel thickening indicates a need for further investigation to r each a pathologic diagnosis.