Patients
All patients were treated and followed-up at Shanghai Children’s Medical
Center. The medical records of patients aged 1-2 years who underwent
liver transplantation between January 2012 and January 2019 were
reviewed. All patients included in this study were diagnosed with PTLD
during the aforementioned period. Patients who died during the follow-up
period were excluded from this analysis. The control patients were
matched 1:2 according to the type of organ transplanted and the period
since transplantation (within 1 year). The control patients were
recruited from a cohort of transplant recipients who did not have PTLD
and who underwent a transplant during the same period as the study
subjects. Clinical characteristics and laboratory findings were
extracted from each patient’s medical records and analyzed.