Rosette-forming glioneuronal tumor of the fourth ventricle. Two cases report and literature review.

Rosette-forming glioneuronal tumor of the fourth ventricle is a primary central nervous system tumor introduced in the group of glioneuronal tumors in the WHO classification of 2007. Initially it was described around the fourth ventricle, but recently have been published cases in different locations. We present 2cases of this rare tumor, both surgically treated.

[Atypical choroid plexus papilloma in adults: case report and literature review].

Introduction: Atypical choroid plexus papilloma is a rare tumour, recently defined by the World Health Organisation and with very few cases reported to date. Choroid plexus tumours are rare intraventricular neoplasms originating from choroid plexus epithelium, with benign papillomas being more frequent than carcinomas. Most of these lesions appear in children, mainly located in the lateral ventricles.