"Oral Chronic Graft-Versus-Host Disease (cGVHD) as a Potential Clinical Marker of the Graft-Versus-Leukemia (GVL) Effect in Allogeneic Hematopoietic Stem Cell Transplantation:Prospective Single-Center Study"

Allogeneic hematopoietic stem cell transplantation (allo-HSCT) is the standard treatment for many malignant blood disorders. Its effectiveness is based on the graft-versus-leukemia (GVL) effect, which is intrinsically linked to the occurrence of graft-versus-host disease (GVHD). While GVHD reflects favorable alloreactivity, its severe forms increase While GVHD reflects favorable allograft reactivity, its severe forms increase non-relapse mortality (NRM) and impair quality of life. Currently, there is no simple clinical marker that can predict or monitor the efficacy of the GVL effect. The investigators therefore hypothesized that chronic oral GVHD, a common and easily identifiable manifestation, could reflect beneficial alloreactivity, reflecting a balance between GVL effect and toxicity. The investigators conducted a prospective, observational, single-center study including patients transplanted at the Nice University Hospital between October 2023 and May 2025, followed by a standardized stomatological protocol before and after transplantation.