Adela Escudero1,2, Cristina Ferreras3, Nuria Rodriguez-Salas3,4,5, Dolores Corral6, Laura Rodriguez4, Antonio Pérez-Martínez3,6,7. 1. Institute of Medical and Molecular Genetics, La Paz University Hospital, Paseo de la Castellana 261, 28046, Madrid, Spain. adela.escudero@salud.madrid.org. 2. La Paz Hospital Institute for Health Research (IdiPAZ), Madrid, Spain. adela.escudero@salud.madrid.org. 3. La Paz Hospital Institute for Health Research (IdiPAZ), Madrid, Spain. 4. Department of Medical Oncology, La Paz University Hospital, Madrid, Spain. 5. Centro de Investigación Biomédica en Red-Cáncer (CIBERONC), Madrid, Spain. 6. Department of Pediatric Hemato-Oncology and Stem Cell Transplantation, La Paz University Hospital, Madrid, Spain. 7. Pediatrics Department, Universidad Autónoma de Madrid, Madrid, Spain.
Abstract
INTRODUCTION: Approximately 10% of pediatric patients with cancer have an inherited, sometimes masked, cancer predisposition syndrome (CPS). Identifying patients with genetic susceptibility to malignant disease is essential for their correct diagnosis and clinical management. MATERIALS AND METHODS: Here, we present the workflow and experience of a multidisciplinary cancer predisposition unit focused on pediatric patients with cancer. RESULTS: Between July 2018 and July 2020, 214 patients were diagnosed with pediatric cancer in our Hospital. Of all, 49 patients were treated at the CPS unit, 48 of whom were recommended a genetic study. Mutational analysis was performed on DNA from peripheral blood samples, with approximately 45% of the patients (n = 22) receiving a confirmed CPS diagnosis, all of whom underwent genetic counseling. These cases represent 20% of all pediatric cancers diagnosed in the same center during this period. Most of the patients were diagnosed with hereditary retinoblastoma; however, we also identified families with Li-Fraumeni syndrome, multiple endocrine neoplasia type 2, hereditary melanoma, hereditary leiomyomatosis, and Gardner syndrome. CONCLUSION: Despite its limitations regarding the type of tumors and number of patients included, this study revealed that implementing a specialized unit focused on children with cancer results in a higher diagnostic rate and better genetic counseling for patients with pediatric cancer predisposition syndromes.
INTRODUCTION: Approximately 10% of pediatric patients with cancer have an inherited, sometimes masked, cancer predisposition syndrome (CPS). Identifying patients with genetic susceptibility to malignant disease is essential for their correct diagnosis and clinical management. MATERIALS AND METHODS: Here, we present the workflow and experience of a multidisciplinary cancer predisposition unit focused on pediatric patients with cancer. RESULTS: Between July 2018 and July 2020, 214 patients were diagnosed with pediatric cancer in our Hospital. Of all, 49 patients were treated at the CPS unit, 48 of whom were recommended a genetic study. Mutational analysis was performed on DNA from peripheral blood samples, with approximately 45% of the patients (n = 22) receiving a confirmed CPS diagnosis, all of whom underwent genetic counseling. These cases represent 20% of all pediatric cancers diagnosed in the same center during this period. Most of the patients were diagnosed with hereditary retinoblastoma; however, we also identified families with Li-Fraumeni syndrome, multiple endocrine neoplasia type 2, hereditary melanoma, hereditary leiomyomatosis, and Gardner syndrome. CONCLUSION: Despite its limitations regarding the type of tumors and number of patients included, this study revealed that implementing a specialized unit focused on children with cancer results in a higher diagnostic rate and better genetic counseling for patients with pediatric cancer predisposition syndromes.
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