Clinical Results of High-Dose Chemotherapy Followed by Autologous Peripheral Blood Stem Cell Transplantation in Children with Advanced Stage Rhabdomyosarcoma

ABSTRACT

Regardless of improvement in cure of Rhabdomyosarcoma (RMS), the results in treatment of advanced stage of RMS in children are still dismal. Recently, high-dose chemotherapy followed by autologous peripheral blood stem cell transplantation (HDC/APBSCT) has been tried to manage the advanced high-risk RMS patients. We investigated the effectiveness of HDC/APBSCT by reviewing the clinical records of high-risk pediatric RMS patients in single institute database. Over twenty years, 37 patients were diagnosed as RMS with high-risk at the time of first diagnosis. These patients were classified as two groups according to treatment method. The first group was HDC/APBSCT and the other was conventional multi-agent chemotherapy group. Differences of clinical results between the two groups were analyzed. The median age of patients was 5 yr, ranging from 6 months to 15 yr. The 5-yr event free survival rate (EFS) of all patients was 24.8% +/- 4.8%. HDC/APBSCT group and conventional multi-agent chemotherapy group were 41.3% +/- 17.8% and 16.7% +/- 7.6% for 5-yr EFS, respectively (P = 0.023). There was a significant difference in the result of HDC/APBSCT between complete remission or very good partial response group and poor response group (50% +/- 20.4% vs 37.5% +/- 28.6%, P = 0.018). HDC/APBSCT can be a promising treatment modality in high-risk RMS patients.