Extraventricular CPPs are rare and can be found primarily in the cerebellopontine angle (CPA). We present a case of primary extraventricular CPP in the right CPA successfully resected with retrosigmoid approach. Detailed surgical techniques of retrosigmoid craniotomy and tumor dissection are presented in high definition video with narration. The video can be found here: http://youtu.be/6591en3nWlY .((Tan LA, Fontes RB, Byrne RW. Retrosigmoid approach for resection of an
extraventricular choroid plexus papilloma in the cerebellopontine angle.Neurosurg Focus. 2014 Jan;36(1 Suppl):1. doi: 10.3171/2014.V1.FOCUS13271. PubMed PMID: 24380509.)).