Risk Factors and Predictive Scoring System For Post-Transplant Lymphoproliferative Disorder after Hematopoietic Stem Cell Transplantation

Biol Blood Marrow Transplant. 2019 Jul;25(7):1441-1449. doi: 10.1016/j.bbmt.2019.02.016. Epub 2019 Feb 20.

Abstract

We analyzed data from 64,539 consecutive patients in the Japanese national transplant registry, including 40,195 after allogeneic hematopoietic stem cell transplantation (HSCT), 24,215 after autologous HSCT and 129 after syngeneic HSCT, of whom 299 developed Epstein-Barr virus-positive post-transplant lymphoproliferative disorder (PTLD). The probability of developing PTLD at 2 years post-HSCT was .79% after allogeneic transplantation, .78% after syngeneic transplantation, and .11% after autologous transplantation. The following variables were identified as risk factors after allogeneic HSCT in multivariate analysis: antithymocyte globulin (ATG) use in a conditioning regimen, ATG use for acute graft-versus-host disease (GVHD) treatment, donor other than an HLA-matched related donor, aplastic anemia, second or subsequent allogeneic HSCT, the most recent year of transplantation, and acute GVHD. The probability at 2 years increased particularly after 2009 (1.24%) than before 2009 (.45%). To stratify the risk of PTLD before allogeneic HSCT, we developed a novel 5-point scoring system based on 3 pretransplant risk factors: ATG use in a conditioning regimen (high dose, 2 points; low dose, 1 point), donor type (HLA-mismatched related donor, 1 point; unrelated donor, 1 point; cord blood, 2 points), and aplastic anemia (1 point). Patients were classified into 4 risk groups according to the summed points: low risk (0 or 1 point), intermediate risk (2 points), high risk (3 points), and very high risk (4 or 5 points) groups, with probabilities at 2 years of .3%, 1.3%, 4.6%, and 11.5%, respectively. Our scoring system is useful for predicting patients at high risk for PTLD. Careful observation and close monitoring of Epstein-Barr virus reactivation are warranted for these high-risk patients.

Keywords: Hematopoietic stem cell transplantation; Post-transplant lymphoproliferative disorder; Predictive scoring system.

Publication types

  • Clinical Trial
  • Multicenter Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Allografts
  • Anemia, Aplastic* / epidemiology
  • Anemia, Aplastic* / therapy
  • Anemia, Aplastic* / virology
  • Antilymphocyte Serum / administration & dosage*
  • Autografts
  • Epstein-Barr Virus Infections* / epidemiology
  • Epstein-Barr Virus Infections* / etiology
  • Female
  • Graft vs Host Disease* / etiology
  • Graft vs Host Disease* / prevention & control
  • Hematopoietic Stem Cell Transplantation*
  • Herpesvirus 4, Human*
  • Humans
  • Lymphoproliferative Disorders* / epidemiology
  • Lymphoproliferative Disorders* / etiology
  • Lymphoproliferative Disorders* / virology
  • Male
  • Middle Aged
  • Risk Assessment
  • Risk Factors
  • Transplantation Conditioning*
  • Transplantation, Isogeneic

Substances

  • Antilymphocyte Serum