Rare cancersRare cancers are associated with poor survival, accounting for 22% of new cancer diagnoses in Europe, and 30% of cancer deaths. Sarcomas are a heterogeneous group of life-threatening rare solid malignancies affecting soft and bone tissues, representing 10% of rare tumors and around 2% of adult tumors, with an incidence of 5.9/100,000/year in Europe. Appropriate management of sarcoma patients is hindered by the absence of referral policies to reference centers (RCs), incorrect or delayed diagnosis, non-adherence of therapies to clinical practice guidelines (CPGs), and lack of expertise by practitioners, which increases the risk of relapse and death. These problems worsen in the Community of Latin American and Caribbean States (CELAC) due to the scarcity or complete unavailability of RCs, expert pathologists, multidisciplinary tumor boards (MTBs), new cancer drugs, clinical trials, patient registry data, and financial resources. Hence, the SELNET project seeks to create a European and Latin American multidisciplinary network of clinical and translational specialists to improve diagnosis and clinical care in sarcomas, with the aim of validating a collaborative model replicable in other rare tumors and in other countries. Recognized cancer centers and research groups of Spain, Italy, France, Mexico, Brazil, Argentina, Costa Rica, and Peru will contribute to better rare cancer care by fostering RCs, healthcare barrier analysis, CPGs, and medical education as key improvement drivers. The core of the research work focuses on improving diagnosis and prognosis of sarcoma patients through the creation of pathological diagnosis networks, MTBs, the conduct of an international registry-based observational study to assess clinical management quality and prognostic factors, and the implementation of an strategic translational research program to develop intercontinental sarcoma biobanks, preclinical models, and a translational study with drugs in rare sarcoma subtypes.

Gallbladder cancer (GBC) is a neglected disease with huge potential for prevention. This project aims at significantly improving the accuracy of risk estimation and early detection of GBC by identifying and adequately considering geographical, environmental, lifestyle, ethnic, gender and molecular differences. We plan to generate the information needed to establish and refine current prevention programmes, including the primary, secondary and tertiary prevention of GBC. We will (1) build a unique European–Latin American GBC biorepository integrated into a tailored IT platform, (2) identify, validate and functionally characterize novel GBC biomarkers, (3) develop a multifactorial risk score that integrates established and newly identified epidemiological and molecular risk factors, (4) improve the understanding of the causal mechanisms that link lifestyle, cultural and behavioural factors to GBC development, (5) unravel novel opportunities for the targeted therapy of incidental GBC, (6) exploit existing and newly generated epidemiological and multi-omics data to improve the accuracy of GBC risk prediction and (7) contribute to the training of the next generation of Latin American researchers in precision medicine for GBC. The generated information will permit identification of individuals at high GBC risk, guiding surveillance and individual decisions on the possible benefit of preventive gallbladder removal in regions of low and high GBC incidence. Novel data on genomic alterations in incidental GBC will pave the way towards implementation of future clinical trials. The planned European–Latin American GBC biorepository and IT platform will constitute a prime resource for translational research on individualized prevention, personalized early detection and targeted therapy of GBC. The participation in our project of representatives of health authorities, patients and the industry guarantees the efficient incorporation of project results into national health policies.