MR Findings of Primary Choroid Plexus Papilloma of the Cerebellopontine Angle: Report of Three Cases and Literature Reviews

Excerpt

Choroid plexus papillomas (CPPs) are rare, histologically benign (WHO I) intracranial neoplasms arising from the neuroectoderm. They represent 0.4–0.6 % of all primary intracranial tumors and occur more frequently in children in whom the frequency is 1.5–4 % [1, 2].Their most frequent location is the lateral ventricle (43 %), followed by the fourth (39 %) and third (10 %) ventricles [3]. They are rarely located in the cerebellopontine angle (CPA), which represents about 9 % of all CPPs when all age groups are considered [1] and are found most often in adults [1, 2]. The imaging findings of intraventricular CPPs have been reported more frequently, whereas the imaging findings of CPA-CPPs have not been well-illustrated. Here, we report three cases of primary CPA-CPPs and describe their appearances on magnetic resonance imaging (MRI), that have some difference with the intraventricular CPPs. …