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Objective: Transitional care in surgical neurooncology is poorly studied. However, this period is pivotal, since it allows the patient to be empowered in his or her disease management. Here, the authors describe the experience of the Necker-Enfants Malades and the Sainte-Anne Hospital collaboration., Methods: The mixed transitional consultations started in September 2019 in a dedicated space for transitional care, named the "La Suite" department, located in the Necker-Enfants Malades Hospital, Paris, France. The authors organized planned consultations to schedule the clinical and radiological follow-up in the adult neurosurgical department but also emergency consultations to manage tumor recurrence in young adult patients. Transitional care was performed jointly by pediatric and adult neurosurgeons who have developed clinical and research skills in the field of surgical neurooncology. Neuropathological analysis was performed by a neuropathologist who is specialized in pediatric and adult neurooncology., Results: Fourteen patients benefited from a mixed transitional consultation. All of them accepted to start their management in an adult neurosurgical environment. Eleven patients (78.6%) for whom the disease was controlled benefited from a planned consultation. Three patients (21.4%) required rapid neurosurgical management for a tumor recurrence (n = 2) or for a new primary CNS tumor (n = 1) and benefited from an emergency consultation., Conclusions: For adult patients harboring a brain tumor during childhood or adolescence, the authors suggest that neurosurgeons specialized in adult surgical neurooncology with a full knowledge in pediatric neurooncology will combine the required skills to optimize care management for these patients within a dedicated multidisciplinary organization framework.

Diagnosis of paediatric tumours of the central nervous system is often difficult because WHO classification criteria are mainly defined for adults tumours and do not always apply to their paediatric counterparts. These tumours are rare (400 cases/year among more than 50 pathological subtypes per year in France). Pathological diagnosis may be a challenge for a general pathologist with a too low number of paediatric cases in his recruitment. Hence, a reference group of paediatric neuropathologists was formed (GENOP) on the behalf of the comité "Tumeurs Cérébrales" de la Société Française de lutte contre les Cancers de l'Enfant. This network is supported by the Institut National du Cancer (INCa). GENOP aim is to structure a centralised review of paediatric central nervous system tumours in order to harmonise neuropathological diagnosis at the national level and enhance patients care. Cases assessed during the last 3 years led GENOP to better identify tumours subtypes for which there is a diagnostic challenge. A set of immunohistochemical or molecular specialised techniques was developed, leading to an increased diagnostic accuracy. It allowed a better distinction between diffuse and circumscribed glioma, a better recognition of glioneuronal differentiation and a better subtyping of embryonal tumours such as medulloblastomas. Inter-observer agreement varied according to the tumour subtypes., (Copyright © 2014. Published by Elsevier Masson SAS.)