Lung function and long-term complications after allogeneic hematopoietic cell transplant

Area of Science:

• Hematopoietic Stem Cell Transplantation
• Pulmonary Medicine
• Oncology

Background:

• The association between early post-transplant pulmonary function and long-term outcomes after allogeneic hematopoietic stem cell transplant (HSCT) remains unclear.
• Assessing lung function early after HSCT is crucial for predicting patient prognosis and potential complications.

Purpose of the Study:

• To investigate if pulmonary function measured early after allogeneic HSCT is associated with 5-year nonrelapse mortality (NRM).
• To determine the relationship between post-transplant lung function and the development of chronic graft-versus-host disease (cGVHD).

Main Methods:

• Retrospective analysis of 2158 patients undergoing allogeneic HSCT between 1992 and 2004.
• Routine pulmonary function tests (PFTs) were performed 60-120 days post-transplant.
• Lung function was assessed using a composite score (FEV1 and DLCO) and individual parameters; Cox regression analyzed associations with NRM and cGVHD.

Main Results:

• A higher composite lung function score, indicating greater impairment, was significantly associated with increased risk of 5-year NRM (HRs ranging from 1.47 to 7.80).
• Impaired individual pulmonary function parameters, especially low forced expiratory volume in 1 second (FEV1), also correlated with higher NRM.
• Low FEV1 post-transplant was linked to an increased risk of developing cGVHD within one year (HRs ranging from 1.26 to 2.02).

Conclusions:

• Diminished pulmonary function early after allogeneic HSCT is a significant predictor of increased NRM.
• Reduced FEV1 is associated with a higher likelihood of developing cGVHD post-transplant.
• Routine PFTs early after HSCT can aid in risk stratification and patient management.