MOSAIC: An Artificial Intelligence-Based Framework for Multimodal Analysis, Classification, and Personalized Prognostic Assessment in Rare Cancers.

PURPOSE: Rare cancers constitute over 20% of human neoplasms, often affecting patients with unmet medical needs. The development of effective classification and prognostication systems is crucial to improve the decision-making process and drive innovative treatment strategies. We have created and implemented MOSAIC, an artificial intelligence (AI)-based framework designed for multimodal analysis, classification, and personalized prognostic assessment in rare cancers. Clinical validation was performed on myelodysplastic syndrome (MDS), a rare hematologic cancer with clinical and genomic heterogeneities. METHODS: We analyzed 4,427 patients with MDS divided into training and validation cohorts. Deep learning methods were applied to integrate and impute clinical/genomic features. Clustering was performed by combining Uniform Manifold Approximation and Projection for Dimension Reduction + Hierarchical Density-Based Spatial Clustering of Applications with Noise (UMAP + HDBSCAN) methods, compared with the conventional Hierarchical Dirichlet Process (HDP). Linear and AI-based nonlinear approaches were compared for survival prediction. Explainable AI (Shapley Additive Explanations approach [SHAP]) and federated learning were used to improve the interpretation and the performance of the clinical models, integrating them into distributed infrastructure. RESULTS: UMAP + HDBSCAN clustering obtained a more granular patient stratification, achieving a higher average silhouette coefficient (0.16) with respect to HDP (0.01) and higher balanced accuracy in cluster classification by Random Forest (92.7% ± 1.3% and 85.8% ± 0.8%). AI methods for survival prediction outperform conventional statistical techniques and the reference prognostic tool for MDS. Nonlinear Gradient Boosting Survival stands in the internal (Concordance-Index [C-Index], 0.77; SD, 0.01) and external validation (C-Index, 0.74; SD, 0.02). SHAP analysis revealed that similar features drove patients' subgroups and outcomes in both training and validation cohorts. Federated implementation improved the accuracy of developed models. CONCLUSION: MOSAIC provides an explainable and robust framework to optimize classification and prognostic assessment of rare cancers. AI-based approaches demonstrated superior accuracy in capturing genomic similarities and providing individual prognostic information compared with conventional statistical methods. Its federated implementation ensures broad clinical application, guaranteeing high performance and data protection.

New problems of a new health system: the creation of a national public policy of rare diseases care in Brazil (1990s-2010s). / Nuevos problemas de un nuevo sistema de salud: la creación de una política pública nacional de atención de enfermedades raras en Brasil (1990-2014).

This study discusses actors and institution movements leading to the disclosure in 2014 of Resolution 199 by the Brazilian Ministry of Health, which establishes the National Policy for the Comprehensive Care of Persons with Rare Diseases. Taking as sources the mainstream newspapers, drafts law, and secondary literature on the subject, we begin our analysis in the early 1990s when the first patient associations were created in Brazil - mainly for claiming more funds for research on genetic diseases - and arrive at the late 2010s when negotiations for a national policy are taking place in the National Congress. Resolution 199 is part of an ongoing process and the path towards its disclosure and the complications that followed have given us elements to discuss contemporary aspects of the Brazilian public health. Based on the references of the history of the present time and the social studies of science, we argue that two aspects have been fundamental to creating a national policy: framing different illnesses within the terminology "rare diseases" and the construction of a public perception about the right of health which is guaranteed by the 1988 Brazilian Constitution.

En este trabajo se analizan los movimientos de actores e instituciones que llevaron a la promulgación, en 2014, de la Resolución 199 del Ministerio de Salud de Brasil, que establece la Política Nacional de Atención Integral a las Personas con Enfermedades Raras. Tomando como fuentes los principales periódicos, proyectos de ley y bibliografía secundaria sobre el tema, comenzamos nuestro análisis a principios de la década de 1990 con la creación de las primeras asociaciones de pacientes en Brasil, para reclamar fundamentalmente más fondos para la investigación de enfermedades genéticas, y llegamos a fines de la década de 2010 con las negociaciones para una política nacional. La Resolución 199 es parte de un proceso en curso, en el que el camino hacia la promulgación y las complicaciones posteriores nos dan elementos para discutir aspectos actuales de la salud pública brasileña. Sobre la base de la historia del tiempo presente y los estudios sociales de la ciencia, argumentamos que hay dos aspectos que han sido fundamentales para crear una política nacional: enmarcar diferentes enfermedades en la terminología "enfermedades raras" y la construcción de una percepción pública sobre el derecho a la salud, que se garantiza en la Constitución brasileña de 1988.

Nuevos problemas de un nuevo sistema de salud: la creación de una política pública nacional de atención de enfermedades raras en Brasil (1990-2014) / New problems of a new health system: the creation of a national public policy of rare diseases care in Brazil (1990s-2010s)

RESUMEN En este trabajo se analizan los movimientos de actores e instituciones que llevaron a la promulgación, en 2014, de la Resolución 199 del Ministerio de Salud de Brasil, que establece la Política Nacional de Atención Integral a las Personas con Enfermedades Raras. Tomando como fuentes los principales periódicos, proyectos de ley y bibliografía secundaria sobre el tema, comenzamos nuestro análisis a principios de la década de 1990 con la creación de las primeras asociaciones de pacientes en Brasil, para reclamar fundamentalmente más fondos para la investigación de enfermedades genéticas, y llegamos a fines de la década de 2010 con las negociaciones para una política nacional. La Resolución 199 es parte de un proceso en curso, en el que el camino hacia la promulgación y las complicaciones posteriores nos dan elementos para discutir aspectos actuales de la salud pública brasileña. Sobre la base de la historia del tiempo presente y los estudios sociales de la ciencia, argumentamos que hay dos aspectos que han sido fundamentales para crear una política nacional: enmarcar diferentes enfermedades en la terminología "enfermedades raras" y la construcción de una percepción pública sobre el derecho a la salud, que se garantiza en la Constitución brasileña de 1988.

ABSTRACT This study discusses actors and institution movements leading to the disclosure in 2014 of Resolution 199 by the Brazilian Ministry of Health, which establishes the National Policy for the Comprehensive Care of Persons with Rare Diseases. Taking as sources the mainstream newspapers, drafts law, and secondary literature on the subject, we begin our analysis in the early 1990s when the first patient associations were created in Brazil - mainly for claiming more funds for research on genetic diseases - and arrive at the late 2010s when negotiations for a national policy are taking place in the National Congress. Resolution 199 is part of an ongoing process and the path towards its disclosure and the complications that followed have given us elements to discuss contemporary aspects of the Brazilian public health. Based on the references of the history of the present time and the social studies of science, we argue that two aspects have been fundamental to creating a national policy: framing different illnesses within the terminology "rare diseases" and the construction of a public perception about the right of health which is guaranteed by the 1988 Brazilian Constitution.

Toward a functional definition of a "rare disease" for regulatory authorities and funding agencies.

BACKGROUND: The designation of a disease as "rare" is associated with some substantial benefits for companies involved in new drug development, including expedited review by regulatory authorities and relaxed criteria for reimbursement. How "rare disease" is defined therefore has major financial implications, both for pharmaceutical companies and for insurers or public drug reimbursement programs. All existing definitions are based, somewhat arbitrarily, on disease incidence or prevalence. OBJECTIVES: What is proposed here is a functional definition of rare based on an assessment of the feasibility of measuring the efficacy of a new treatment in conventional randomized controlled trials, to inform regulatory authorities and funding agencies charged with assessing new therapies being considered for public funding. METHODS: It involves a five-step process, involving significant negotiations between patient advocacy groups, pharmaceutical companies, physicians, and public drug reimbursement programs, designed to establish the feasibility of carrying out a randomized controlled trial with sufficient statistical power to show a clinically significant treatment effect. RESULTS AND CONCLUSIONS: The steps are as follows: 1) identification of a specific disease, including appropriate genetic definition; 2) identification of clinically relevant outcomes to evaluate efficacy; 3) establishment of the inherent variability of measurements of clinically relevant outcomes; 4) calculation of the sample size required to assess the efficacy of a new treatment with acceptable statistical power; and 5) estimation of the difficulty of recruiting an adequate sample size given the estimated prevalence or incidence of the disorder in the population and the inclusion criteria to be used.

Creating a European Union framework for actions in the field of rare diseases.

Rare diseases, including those of genetic origin, are defined by the European Union as life-threatening or chronically debilitating diseases which are of such low prevalence (less than 5 per 10,000). The specificities of rare diseases - limited number of patients and scarcity of relevant knowledge and expertise - single them out as a unique domain of very high European added-value. The legal instruments at the disposal of the European Union, in terms of the Article 152 of the Treaties of the European Union, are very limited. However a combination of instruments using the research and the pharmaceutical legal basis and an intensive and creative use of funding from the First Public Health Programme 2003-2008 and from the Second Health Programme 2008-2013 has permitted to create a solid basis that Member States have considered enough to put rare diseases in a privileged position in the health agenda. The adoption of the Commission Communication, in November 2008, and of the Council Recommendation, in June 2009, and the future adoption of the Directive on Cross-border healthcare, maybe during 2010, have created an operational framework to act in the field of rare disease with European coordination in several areas (classification and codification, European Reference Networks, orphan drugs, European Committee of Experts, etc.). In conclusion, Rare diseases is an area with enormous and practical potentialities for the European cooperation.

[Epidemiology and management of rare paediatric tumours within the framework of the French Society for Children Cancer]. / Tumeurs rares en pédiatrie : particularités épidémiologiques et organisation de leur prise en charge dans le cadre de la Société française des cancers et des leucémies de l'enfant et de l'adolescent (SFCE).

Less than 1% of cancer occurs in children. With the progress made by national and international cooperative groups 75% of them are actually cured. However some entities have an incidence so weak that we can't actually establish standardized therapeutics guidelines. To improve our knowledge on these rare tumours a national organisation become necessary as well as an international collaboration. A French rare tumour committee was created within the French Society for Children Cancer (SFCE). Others European countries have such organisation. The objectives of these tasks groups are to enhance our knowledge of the real incidence of these rare tumours, their evolution, and to propose therapeutic recommendations for each of them. This article focuses on the specific French organization for rare tumours treatment. It also describes the draft for the creation of a new data base for prospective registry of clinical, therapeutics and follow up data. To provide a better understanding of these pathologies, the "Bulletin du Cancer's" editorial board decided to regularly publish an update on a rare paediatric tumour in a specific section.

TRICARE; rare diseases definition. Final rule.

This final rule revises the definition of rare diseases to adopt the definition of a rare disease as promulgated by the National Institutes of Health, Office of Rare Diseases. The rule modification will result in the definition used by the TRICARE program for a rare disease to be consistent with the definition used by the National Institutes of Health and the Food and Drug Administration. TRICARE has generally been applying the broader National Institutes of Health and Food and Drug Administration definitions when making coverage decisions for treatments; therefore, there will be no practical changes for beneficiaries.

How did uncommon disorders become 'rare diseases'? History of a boundary object.

The category of 'rare diseases' has been in growing use in the fields of public health and patient advocacy for the past 15 years in Europe. In this socio-historical inquiry, I argue that this category, which appeared initially as a by-product of the orphan drug issue in the United States of America, is a boundary object. As such, it has different specific local uses: a meaningless category for physicians, it relates to the patients' experience of illness, whereas the pharmaceutical industry first considered it as being synonymous with small markets and then with innovation. Public bodies contributed to framing a common and blurred use, based on a statistical definition whose purpose was to foster co-operation between the four groups involved in the issue. In the definition process of the category of rare diseases, the key actors were the patients and public bodies, not medical professionals or the pharmaceutical industry.

[Benefit assessment in special situations--rare diseases]. / Nutzenbewertung in besonderen Situationen--Seltene Erkrankungen.

The term rare disease is often used to justify why special study designs and, in particular, randomisation cannot be implemented and therefore cannot be requested. Definitions of rare diseases are not uniform, and absolute numbers of common definitions are large enough to perform clinical trials. Due to smaller patient numbers in common clinical trials patients with rare diseases are subject to a higher risk for imprecise results. Increasing this risk by using inadequate methodological designs is not justified. A compromise regarding the special situation of these patients is acceptable for certain details but not for the main study concept. It should be made clear that patients with rare diseases have the same right to receive adequately tested treatments as all other patients.

Characteristics of a medical care program for specific diseases in Japan in an era of changing cost-sharing.

The Medical Care Program for Specific Diseases (Specific Diseases Program) was initiated in 1972. The Program has two major components; research grant for specific diseases and medical cost subsidy for specific diseases. The research grant component now targets 118 diseases, and the medical cost subsidy component supports all or part of the co-payments of medical expenses for patients of 44 out of the 118 research target diseases. The present study reviewed public assistance programs for the vulnerable population in Japan, particularly those with designated Specific Diseases, in the context of the wider social security system. Existing governmental information were abstracted and analyzed. The results showed that the recent reform of the Specific Disease Program, which requires the patients in this Program to share a small portion of the medical costs, influenced the number of patients and health services utilization. Other health insurance reforms also have significant effects on the number of patients registered in the Specific Diseases Program, reflecting the relative merit/demerit of the Program in comparison with the general health insurance scheme. Therefore, in an environment of social security reform, formulation of health care policies for specific programs should take into account the relative merits and demerits of the Program in question, in comparison with the general health insurance scheme, to avoid misestimating the number of patients covered by the Program and their utilization of health care services.