NK Addo, ID Kamaly-Asl, VA Josan… - Journal of …, 2011 - thejns.org ... Choroid plexus papillomas (CPPs) are rare, benign intraventricular neoplasms. They represent around 2%–3% of intracranial tumors in children and 0.5% of tumors in adults, 25 and they can also occur prenatally. 2,19 In the ...