Le neurofibrome plexiforme est une tumeur bénigne rare des nerfs périphériques aux dépens des cellules conjonctives du périnevre. Il est pathognomonique de la neurofibromatose de type 1 (NF1 ou maladie de Von Recklinghausen). L'IRM est d'une grande aide au diagnostic de cette pathologie. La confirmation anatomopathologique est parfois nécessaire en particulier en dehors d'un contexte évocateur d'une NF1. Nousrapportonsl'observation d'une petite fille atteinte de neurofibrome plexiforme cervical révélateur d'une neurofibromatose Type 1.
Originally recognized by Cushing and Bailey, hemangioblastoma is a developmental vascular neoplasm that is predominantly found in the posterior fossa. It is a highly vascularized tumor, with well-differentiated histologic features. Although rare, it remains the most common primary tumor of cerebellum in adults, along with metastases. MRI is the gold standard, allowing a precise characterization of the lesion's features, and its relationship with the surrounding structures. We report the case of a patient with a cerebellar symptomatology, in whom brain MRI raises the diagnosis of hemangioblastoma, which was then confirmed by histopathologic examination.
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