A case of dysembryoplastic neuroepithelial tumour of the cerebellum occurring in a 28-year-old woman is presented. The lesion extended from the cortex of the inferior vermis upwards into the white matter. Histologically, it exhibited areas of microcystic cerebellar astrocytoma and glial regions with hamartomatous blood vessels as well as areas with oligodendrocyte-like cells (OLC) with a delicate, fibrillary stroma lying in a mucinous, often microcystic matrix. The OLC showed prominent rosette formation and immunohistochemical features suggesting neuronal, i.e. granule cell, differentiation.
Attempts were made to treat 50 patients suffering from various types of chronic pain with SCS (PISCES). In 33 patients the test stimulation was successful so that an implantation of the system was carried out. After a minimum observation period of two years, only six patients still reported satisfactory alleviation of pain. A more careful selection of patients suffering from different types of pain would appear to be the pre-requisite for better results.
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