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We aimed to analyse health care services for adolescents and young adults (AYA) with sarcomas in Spain.A survey was sent to all Spanish cancer centres, including questions about demographic, facilities, and treatment strategies for AYAs with sarcomas in the last 2 years.Thirty-five units participated in the survey, 17 paediatric and 15 adult units. There were three specialized AYA units. First line regimen varied depending on whether the treating unit was paediatric or not, for osteosarcomas, rhabdomyosarcomas, and non-rhabdomyosarcomas. By contrast, 91.4% of Ewing sarcomas were treated according to EE2012. In the relapse setting, differences between units were higher in all tumours. Additionally, 48% of the units reported not having trials for this population.There are major differences in the treatment of AYAs with sarcomas between adult and paediatric units. Enormous efforts are needed to homogenize treatments and increase the access to innovation.

CTCF germline mutations have been related to MRD21. We report the first bilateral Wilms tumor suffered by a MRD21 patient carrying an unreported CTCF missense variant in a zinc finger domain of CTCF protein. We found that germline heterozygous variant I446K became homozygous in the tumor due to a loss of heterozygosity rearrangement affecting the whole q arm on chromosome 16. Our findings propose CTCF I446K variant as a link between MRD21 and Wilms tumor predisposition.

Rhabdomyosarcoma (RMS) is the most frequent soft tissue sarcoma (STS) in children and adolescents. In Spain the annual incidence is 4.4 cases per million children

Purpose: The COVID-19 pandemic has forced healthcare stakeholders towards challenging decisions. We analyse the impact of the pandemic on the conduct of phase I-II trials for paediatric cancer during the first month of state of alarm in Spain.Methods: A questionnaire was sent to all five ITCC-accredited Spanish Paediatric Oncology Early-Phase Clinical Trial Units, including questions about impact on staff activities, recruitment, patient care, supply of investigational products and legal aspects.Results: All units suffered personnel shortages and difficulties in enrolling patients, treatment continuity or performing trial assessments. Monitoring activity was frequently postponed (73%), and 49% of on-going trials interrupted recruitment. Only two patients could be recruited during this period (75% reduction in the expected rate).Conclusions: The COVID-19 crisis has significantly impacted clinical research practice and access to innovation for children with cancer. Structural and functional changes are under way to better cope with the expected future restrictions.

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

Multidisciplinary tumour boards (MDTs) are conducted worldwide for the management of patients with cancer, and they deliver a higher standard of care by simultaneously involving different specialists in diagnosis and treatment planning. However, information of paediatric MDTs functioning is scarce. A pilot study was conducted in Spain in the frame of the European Expert Paediatric Oncology Reference Network for Diagnostics and Treatment (ExPO-r-Net). A specific questionnaire was designed regarding various features of MDT practice. Data collected included information on the centres and the team, infrastructure for meetings, MDT organization/logistics and clinical decision-making. The survey was distributed to all Paediatric Oncology Units that register patients in the Spanish Registry of Childhood Tumours (RETI-SEHOP). 32 out of 43 contacted centres responded the questionnaire (74 % response rate; 88 % response rate for centres with > 25 new patients/year). All units with > 25 new patients/year have a dedicated Paediatric MDT compared to 76 % of units with aecurrency sign25 new patients/year. MDTs should be improved at institutional level by clear protected time in service planning for all specialists involved, incentives for attendance and attendance registration. Clinical decision-making process and follow-up of recommendation adherence should be assessed and potential legal responsibilities for physicians participating in Tumour Board defined. Network collaboration through virtual MDTs, using available videoconferencing tools, is an opportunity to share expertise among centres.