Pediatric Hematologic Malignancies

This single arm pilot phase I study with safety run-in is designed to estimate the safety and efficacy of a familial mismatched or haploidentical hematopoietic stem cell transplantation (haplo-HSCT) using a novel graft modification technique (selective αβ-TCR and CD19 depletion).

Cancer treatments in children are very intense and often cause side effects such as nausea, vomiting, loss of appetite, and changes in taste and smell. These sensory alterations can impact eating habits, but they are still poorly understood in children. The study aims to assess whether it is feasible to measure these sensory changes (taste, smell, salivation, and food preferences) in children and adolescents undergoing cancer treatment. This study is a feasibility study with 30 patients aged 7 to 17 years, treated at the Pediatric Hematology and Oncology Institute (IHOPE) in Lyon. Sensory tests and questionnaires to evaluate the perceptions, oral health, eating habits, nutritional status, and quality of life are used. The inclusion was initially planned at diagnosis, before any administration of chemotherapy. However, the study quickly encountered a recruitment problem due to the emotional impact and medical burden of this initial period of care (study offered to 11 families over a period of 5 months, 3 patients included). An amendment to the protocol was therefore made to be able to modify the inclusion period after the completion of chemotherapy. This modification was implemented on May 15, 2025, and allowed the inclusion of two new patients, making a total of 5 patients. Of these 5 patients, two completed all the tests during V0 and V1, two completed V0 but not V1, one did not complete any of the visits. This feasibility phase will help determine whether the tools are suitable and well accepted. The results will be used to design a larger study aimed at better understanding how taste and smell alterations influence the eating behaviors of young patients during cancer treatment. Recruitment will continue for six more months in order to reach the target number of participants.