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Ferrari A, Bergamaschi L, Chiaravalli S, Livellara V, Sironi G, Nigro O, Puma N, Gattuso G, Morosi C, Gasparini P, Caccavo R, Pecori E, Alessandro O, Vennarini S, Gandola L, Massimino M, Casanova M. Metastatic rhabdomyosarcoma: Evidence of the impact of radiotherapy on survival. A retrospective single-center experience. Pediatr Blood Cancer 2022; 69:e29853. [PMID: 35731852 DOI: 10.1002/pbc.29853] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Accepted: 06/05/2022] [Indexed: 11/11/2022]
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, that is, 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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Affiliation(s)
- Andrea Ferrari
- Pediatric Oncology Unit, Medical Oncology and Hematology Department, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Luca Bergamaschi
- Pediatric Oncology Unit, Medical Oncology and Hematology Department, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Stefano Chiaravalli
- Pediatric Oncology Unit, Medical Oncology and Hematology Department, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Virginia Livellara
- Pediatric Oncology Unit, Medical Oncology and Hematology Department, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Giovanna Sironi
- Pediatric Oncology Unit, Medical Oncology and Hematology Department, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Olga Nigro
- Pediatric Oncology Unit, Medical Oncology and Hematology Department, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Nadia Puma
- Pediatric Oncology Unit, Medical Oncology and Hematology Department, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Giovanna Gattuso
- Pediatric Oncology Unit, Medical Oncology and Hematology Department, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Carlo Morosi
- Radiology Department, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Patrizia Gasparini
- Tumor Genomics Unit, Department of Research, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Roberta Caccavo
- Pediatric Oncology Unit, Medical Oncology and Hematology Department, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Emilia Pecori
- Pediatric Radiotherapy Unit, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy
| | - Ombretta Alessandro
- Pediatric Radiotherapy Unit, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy
| | - Sabina Vennarini
- Pediatric Radiotherapy Unit, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy
| | - Lorenza Gandola
- Pediatric Radiotherapy Unit, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy
| | - Maura Massimino
- Pediatric Oncology Unit, Medical Oncology and Hematology Department, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Michela Casanova
- Pediatric Oncology Unit, Medical Oncology and Hematology Department, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
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