{"id":"268106fa-4ce3-412a-aafd-2b2ad938ddae","slug":"rapid-malignant-progression-of-an-intraparenchymal-choroid-plexus-papillomas","title":"Rapid malignant progression of an intraparenchymal choroid plexus papillomas","authors":["Luca Ruggeri","Nicola Alberio","Raffaele Alessandrello","Giovanni Cinquemani","Cesare Gambadoro","Rita Lipani","Rosario Maugeri","Francesco Nobile","Domenico Gerardo Iacopino","Giovanni Urrico","Roberto Battaglia"],"abstract":"Background: Choroid plexus tumors (CPTs) are rare neoplasms accounting for only 0.3–0.6% of all brain tumors in adults and 2–5% in children. The World Health Organization (WHO) classification describes three histological grades: grade I is choroid plexus papilloma (CPP), grade II is atypical papilloma, and grade III is the malignant form of carcinoma. In adults, CPTs rarely have a supratentorial localization. Case Description: Here we report a very rare case of an intraparenchymal parietal CPP with a rapid histological transition from grade I to grade III WHO in a 67-year-old man, in <7 months. Conclusion: Because of the rarity of these oncotypes, descriptions of each new case are useful, mostly to consider this diagnostic entity in extraventricular brain tumors of adults, despite an unusual location.","thumbnailUrl":"https://sni-digital-videos.s3.amazonaws.com/articles/268106fa-4ce3-412a-aafd-2b2ad938ddae/featured/hero-1782420848046.png","publishDate":"2018-07-05T00:00:00.000Z","doi":"10.4103/sni.sni_434_17","categories":["General Neurosurgery","Case Report"],"fullTextUrl":"http://surgicalneurologyint.com/wp-content/uploads/2018/07/8912/SNI-9-131.pdf"}