Spontaneous malignant transformation of a supratentorial pilocytic astrocytoma. Sarabia-Herrero; M. Pilocytic astrocytoma PA is a circumscribed neoplasia considered as a grade I astrocytoma by the World Health Organization. Its most common location is the cerebellum and it develops during the first two decades of the life. Anaplastic or malignant transformation MT can rarely occur and is usually related to previous radiation.
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Astroblastoma of the cerebellum in an infant; report of a case. Arch Pediatr. PMID: No abstract available. Two cerebellar tumours with unusual features. Cystic astrocytoma. Papilloma of the chorid plexus. J Neurosurg. Choudhri AF, et al. PMID: Review. Primary malignant astrocytoma of the cerebellum in children. Report of a case with electron microscopic and cytofluorometric DNA evaluation.
Itoh Y, et al. Childs Nerv Syst. Show more similar articles See all similar articles. Copy Download.
The present essay is illustrated with magnetic resonance images obtained at the authors' institution over the past 15 years and discusses the main imaging findings of intraventricular tumor-like lesions ependymoma, pilocytic astrocytoma, central neurocytoma, ganglioglioma, choroid plexus papilloma, primitive neuroectodermal tumors, meningioma, epidermoid tumor. Such lesions represent a subgroup of intracranial lesions with unique characteristics and some image patterns that may facilitate the differential diagnosis. Key words: Neoplasms; Cerebral ventricle neoplasms; Central nervous system; Magnetic resonance imaging. Elas ocorrem numa forma benigna, o papiloma do plexo coroide, e menos frequentemente, numa forma maligna, o carcinoma do plexo coroide. Podem formar massas focais, com margens regulares 1. A TC mostra massa lobulada hiperdensa nitidamente demarcada, com edema periventricular 4 , 5. Rev Imagem.