Hairy cell leukemia presenting as a pleural mass without leukemic component: a case report.

that analysis of 16S ribosomal RNA from the gut microbiome can be used to elucidate its effect on patient outcomes after transplantation [15]. Future studies should focus on the molecular mechanisms using metabolomic analyses. In summary, FMT shows promise for restoring microbial diversity and treating aGVHD in patients undergoing allo-HSCT. However, FMT remains experimental and the most effective route of administration, product formulation, volume, and frequency of the procedure has not yet been established. Further studies are required to evaluate the potential benefits of FMT in patients with steroid-refractory acute GVHD.