Relapsed (disease coming back) or refractory (disease not responding to chemo) lymphoma can be given high dose chemotherapy followed by Autologous Stem Cell Transplants in which case stem cells from the patient (self) are collected after chemotherapy cycle and given back after high dose chemotherapy of transplant.
Some of young patient and refractory patient are treated with Allogenic Haematopoietic Stem Cell Transplant where stem cells are taken from HLA matched donor.