Σφακιανάκης Αλέξανδρος
ΩτοΡινοΛαρυγγολόγος
Αναπαύσεως 5 Άγιος Νικόλαος
Κρήτη 72100
00302841026182
00306932607174
alsfakia@gmail.com

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Κυριακή 26 Ιουνίου 2022

Metastatic rhabdomyosarcoma: evidence of the impact of radiotherapy on survival. A retrospective single‐center experience

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Abstract

Background

The prognosis for patients with metastatic rhabdomyosarcoma (RMS) remains largely unsatisfactory despite the adoption of intensive multimodal therapy. To assess the role of different treatments adopted over the years, we retrospectively analyzed a cohort of patients <21 years old with metastatic RMS, treated from 1990 to 2020 at a referral center for pediatric sarcomas.

Methods

Patients were treated using a multimodal approach that included surgery, radiotherapy and chemotherapy (both high-dose chemotherapy and maintenance therapy in some cases). The type of radiotherapy administered was categorized as: radical (to all sites of disease); partial (to at least one, but not all sites of disease); or none. A landmark analysis was used to examine the impact of radiotherapy on survival, i.e. patients who had an event before day 221 were excluded from the analysis.

Results

The series included 80 patients. Event-free survival (EFS) and overall survival (OS) rates at 5 years were 17.3% and 21.3%, respectively. Survival was significantly associated with radiotherapy to metastatic sites, and with the radiotherapy category. In particular, 5-year EFS and OS rates were 70.6% and 76.0% for patients given radical radiotherapy, and 4.8% and 10.7%, respectively, for those given partial radiotherapy or none. Using the Cox multivariable analysis, OS correlated significantly with radiotherapy category.

Conclusions

While confirming the poor overall outcome of patients with metastatic RMS, this study identified radiotherapy – when given to all sites of disease (including metastases) - as the main variable influencing survival.

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