Post-transplantation lymphoproliferative disorder with gastrointestinal involvement.

Post-transplantation lymphoproliferative disorders (PTLDs) are lymphoid proliferations or lymphomas that are the second most common tumors in adult transplant recipients. Most cases of PTLD are attributed to Epstein-Barr virus, which induces B-cell proliferation and occurs in the setting of severe immunosuppression after solid organ or bone marrow transplantation. The disorder is seen in 1-3% of liver transplant recipients and has a variable presentation chronology. Herein, we chronicle a case of aggressive B-cell lymphoma (PTLD WHO class-3) presenting with isolated gastrointestinal involvement in an Epstein-Barr virus-negative patient with living-donor liver transplantation, 4 years after receiving the transplant. While typical symptoms may be elusive in the immunocompromised setting, clinicians should be vigilant for underlying PTLD with isolated gastrointestinal involvement. Prompt detection and characterization by endoscopic evaluation with biopsy should be particularly stressed in such patients.