Post-transplant lymphoproliferative disorder after pediatric liver transplantation: characteristics and outcome

Area of Science:

• Transplant Surgery
• Pediatric Oncology
• Immunology

Background:

• Post-Transplant Lymphoproliferative Disorder (PTLD) is a serious complication following organ transplantation.
• Risk factors include Epstein-Barr virus, immunosuppression intensity, and cytomegalovirus infection.

Purpose of the Study:

• To determine the incidence, clinical features, risk factors, histopathology, and outcomes of PTLD in pediatric liver transplant recipients.
• To assess the diagnostic criteria and prognostic indicators for PTLD in this population.

Main Methods:

• Retrospective analysis of 383 pediatric liver transplants performed between November 1992 and December 2005.
• PTLD diagnosis confirmed by clinical, histological, and immunohistological evaluation using Knowles' classification.
• Data collected on patient demographics, transplant details, PTLD onset, clinical presentation, histopathology, and outcomes.

Main Results:

• PTLD incidence was 5.7% (22 patients), with an average onset of 24.9 months post-transplant.
• Common clinical manifestations included malaise, fever, adenopathy, hepatosplenomegaly, and gastrointestinal bleeding.
• Histopathological diagnoses comprised Plasmocytic Hyperplasia (n=10), Polymorphic Lymphoproliferative Disorder (n=8), and Non-Hodgkin Lymphoma (n=4).
• Overall mortality was 18%.

Conclusions:

• PTLD presents with diverse and nonspecific clinical symptoms, necessitating a high index of suspicion for early detection.
• Early diagnosis is associated with more favorable outcomes and potentially less aggressive lesions.
• The observed mortality rate in this series aligns with recent literature, suggesting improved management strategies.