Volume 70, Issue 9 e30447
RESEARCH ARTICLE

Intra-abdominal desmoplastic small round cell tumor: The European pediatric Soft tissue sarcoma Study Group (EpSSG) experience

Pablo Berlanga

Corresponding Author

Pablo Berlanga

Department of Pediatric and Adolescent Oncology, Gustave-Roussy, Université Paris-Saclay, Villejuif, France

Correspondence

Pablo Berlanga, Department of Pediatric and Adolescent Oncology, Gustave-Roussy, Cancer Campus, Université Paris-Saclay, Gustave Roussy, 114 rue Edouard Vaillant, 94805 Villejuif Cedex, France.

Email: [email protected]

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Daniel Orbach

Daniel Orbach

SIREDO Oncology Center, Institut Curie, PSL University, Paris, France

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Reineke A. Schoot

Reineke A. Schoot

Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands

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Michela Casanova

Michela Casanova

Pediatric Oncology Unit, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy

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Rita Alaggio

Rita Alaggio

Pathology Department, Ospedale Pediatrico Bambino Gesù IRCCS, Università La Sapienza, Rome, Italy

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Nadege Corradini

Nadege Corradini

Department of Pediatric Oncology, Institut d'Hematologie et d'Oncologie Pédiatrique,/Centre, Léon Bérard, Lyon, France

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Bernadette Brennan

Bernadette Brennan

Pediatric Oncology, Royal Manchester Children's Hospital, Manchester, UK

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Gema L. Ramirez-Villar

Gema L. Ramirez-Villar

Pediatric Oncology Unit, Hospital Universitario Virgen del Rocío, Sevilla, Spain

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Lisa Lyngsie Hjalgrim

Lisa Lyngsie Hjalgrim

Department of Pediatrics and Adolescent Medicine, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark

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Julia C. Chisholm

Julia C. Chisholm

Children and Young People's Unit, The Royal Marsden NHS Foundation Trust and Institute of Cancer Research, Sutton, UK

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Gianni Bisogno

Gianni Bisogno

Department of Women's and Children's Health, University of Padua, Padua, Italy

Pediatric Hematology Oncology Division, University Hospital of Padua, Padua, Italy

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Beatrice Coppadoro

Beatrice Coppadoro

Department of Women's and Children's Health, University of Padua, Padua, Italy

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Akmal Safwat

Akmal Safwat

Danish Center for Particle Therapy, Aarhus University Hospital, Aarhus, Denmark

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Johannes H. M. Merks

Johannes H. M. Merks

Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands

Division of Imaging and Oncology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands

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Gabriela Guillen Burrieza

Gabriela Guillen Burrieza

Surgical Oncology and Neonatal Surgery, Pediatric Surgery Department, Hospital Infantil Universitari Vall d'Hebron, Barcelona, Spain

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Max M. van Noesel

Max M. van Noesel

Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands

Division of Imaging and Oncology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands

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Andrea Ferrari

Andrea Ferrari

Pediatric Oncology Unit, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy

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First published: 26 May 2023
Citations: 1

Pablo Berlanga and Daniel Orbach are the co-first authors.

Abstract

Background

This study describes the clinical findings of a consecutive series of pediatric and adolescent patients with a diagnosis of intra-abdominal desmoplastic small round cell tumor (DSRCT) prospectively enrolled in European pediatric Soft tissue sarcoma Study Group (EpSSG) protocols: the BERNIE study, the EpSSG MTS 2008 study, and the EpSSG NRSTS 2005 study.

Methods

Patients aged less than 21 years with a diagnosis of DSRCT arising in the abdomen were included. All trials recommended a multimodal approach including intensive multidrug chemotherapy and loco-regional treatment with surgery and/or radiotherapy whenever possible.

Results

The analysis included 32 cases (median age 13.7 years, male:female ratio 1.5:1). Three patients had localized tumors, seven had regionally disseminated disease, and 22 extraperitoneal metastases. All but one patient received multidrug chemotherapy and 11 had maintenance chemotherapy. Loco-regional treatment consisted of surgery only in seven cases, surgery plus adjuvant radiotherapy in 10, and radiotherapy only in six. Among the 17 cases who had radiotherapy, six had irradiation of the primary site, 10 had whole abdominopelvic radiotherapy plus boost to macroscopic residual disease, and one had irradiation to lung metastases only. With a median follow-up of 76 months (range: 18–124 months), 5-year event-free and overall survivals were 19.7% and 21.0%, respectively. Event-free survival was significantly worse for patients who did not receive loco-regional treatment (p-value .007).

Conclusions

The study confirmed that the outcome of patients with DSRCT remains dismal and did not improve over recent years despite an intensive multimodal treatment approach.

CONFLICT OF INTEREST STATEMENT

The authors have no potential conflicts of interest to declare.

DATA AVAILABILITY STATEMENT

The data are available on request from the authors.

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