Radiation Therapy in the Treatment of the Astrocytomas and Midline Tumours of Childhood
Prior to the publication by WHO of the “Histological Typing of Tumours of the Central Nervous System” by Zülch in 1979 , both clinicians and pathologists were using a variety of different terminologies. Zülch listed five different readily dif-ferentiable astrocytomas (astrocytic tumours), together with a number of subtypes. Worthy of special mention is the pilocytic astrocytoma, which is also met with in the literature under the name juvenile astrocytoma. This tumour, which histologically resembles a spongioblastoma, is a slowly growing neoplasm, often located in the posterior cranial fossa. It can be completely removed surgically, and is considered to be not very sensitive to radiation [6, 10, 14]. However, Marsa et al.  report good long-term results from radiotherapy in such tumours located in the optic chiasm, the third ventricle, the hypothalamus and the cerebellum.
KeywordsBrain Tumour Pilocytic Astrocytoma Astrocytic Tumour Posterior Cranial Fossa Astrocytoma Cerebellum
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