title: Unique presentation of cerebellopontine angle choroid plexus papillomas: case report and review of the literature.
abstract: Objectives We present the case of a choroid plexus papilloma (CPP) in the cerebellopontine angle (CPA), describe the different appearances of CPPs with a variety of imaging techniques, and discuss the differential diagnosis of CPA tumors. Participant and Design We report the case of a 52-year-old woman with headache, tinnitus, and unilateral hearing impairment whose preoperative magnetic resonance imaging revealed a heterogeneously enhancing CPA mass that extended into the internal auditory canal. Main Outcome Measures, Results, and Conclusion The preoperative imaging appearance of the lesion was most consistent with that of a schwannoma. Postoperative histopathologic examination found the tumor to be a CPP with cuboidal epithelial cells overlying fibrovascular stroma. CPPs are rare benign central nervous system neoplasms arising from choroid plexus epithelium. The most common site of presentation is in the fourth ventricle in adults and the lateral ventricles in children. CPPs rarely occur in the CPA, and when they do, clinical-radiologic diagnosis is difficult due to both the rarity of this presentation and to nonspecific radiological features.
authors.affiliation: School of Medicine, The George Washington University School of Medicine, Washington, District of Columbia, United States.
authors.forename: Mark
authors.initials: M
authors.lastname: Anderson
authors.affiliation: Department of Neurosurgery, The George Washington University, Washington, District of Columbia, United States.
authors.forename: Parker
authors.initials: P
authors.lastname: Babington
authors.affiliation: Department of Radiology, The George Washington University, Washington, Washington, District of Columbia, United States.
authors.forename: Reza
authors.initials: R
authors.lastname: Taheri
authors.affiliation: Department of Pathology, The George Washington University, Washington, District of Columbia, United States.
authors.forename: Mairo
authors.initials: M
authors.lastname: Diolombi
authors.affiliation: Department of Neurosurgery, The George Washington University, Washington, District of Columbia, United States.
authors.forename: Jonathan H
authors.initials: JH
authors.lastname: Sherman
keywords: cerebellopontine angle; choroid plexus papilloma
references.citation: Am J Roentgenol Radium Ther Nucl Med. 1970 Nov;110(3):608-17
references.pmid: 5489698
references.citation: Eur Radiol. 2007 Oct;17(10):2472-82
references.pmid: 17562049
references.citation: Arch Iran Med. 2010 Nov;13(6):552-5
references.pmid: 21039014
references.citation: Acta Neuropathol. 2006 May;111(5):500-2
references.pmid: 16609849
references.citation: Clin Neurol Neurosurg. 2006 Sep;108(6):586-9
references.pmid: 15963638
references.citation: AJNR Am J Neuroradiol. 1999 May;20(5):882-5
references.pmid: 10369360
references.citation: Acta Neurochir (Wien). 2012 Feb;154(2):295-9
references.pmid: 21953479
references.citation: Indian Pediatr. 1994 Oct;31(10):1305-8
references.pmid: 7875804
references.citation: Surg Neurol. 1999 Jul;52(1):37-9
references.pmid: 10390170
references.citation: Acta Neurochir (Wien). 1995;135(3-4):144-9
references.pmid: 8748805
references.citation: Neurosurg Focus. 2005 Jun 15;18(6A):E4
references.pmid: 16048290
references.citation: Neuroradiology. 1990;31(6):541-3
references.pmid: 2352637
references.citation: J Neurosurg. 1988 Dec;69(6):843-9
references.pmid: 3193190
references.citation: Neuroradiology. 2008 Aug;50(8):741-2
references.pmid: 18587569
references.citation: Neurol India. 2002 Sep;50(3):352-8
references.pmid: 12391469
references.citation: Neoplasma. 2004;51(4):306-12
references.pmid: 15254663
references.citation: J Neurosurg. 2000 May;92(5):870-2
references.pmid: 10794304
references.citation: Br J Radiol. 1992 Sep;65(777):754-7
references.pmid: 1393408
references.citation: Magn Reson Imaging. 2003 Jul;21(6):663-72
references.pmid: 12915198
references.citation: J Magn Reson Imaging. 2001 Jul;14(1):78-82
references.pmid: 11436218
references.citation: J Clin Neurosci. 2009 Jan;16(1):121-4
references.pmid: 19008101
references.citation: J Int Med Res. 2010 Jan-Feb;38(1):289-92
references.pmid: 20233541
references.citation: J Neurooncol. 2011 Jul;103(3):777-83
references.pmid: 21061142
references.citation: Surg Neurol. 1991 Jul;36(1):54-8
references.pmid: 2053075
references.citation: Surg Neurol. 1982 Nov;18(5):367-71
references.pmid: 6983728
references.citation: Eur Radiol. 2007 Nov;17(11):2908-20
references.pmid: 17569053
references.citation: Surg Neurol. 1979 Aug;12(2):123-7
references.pmid: 316201
references.citation: Am J Otol. 1996 Jan;17(1):119-22
references.pmid: 8694114
references.citation: Surg Neurol. 1999 Jun;51(6):621-9
references.pmid: 10369230
references.citation: Neurology. 2005 Sep 27;65(6):842
references.pmid: 16186520
references.citation: Acta Neurochir (Wien). 1996;138(7):802-10
references.pmid: 8869707
references.citation: J Neurooncol. 2004 May;68(1):49-55
references.pmid: 15174521
references.citation: Br J Cancer. 2002 Nov 4;87(10):1086-91
references.pmid: 12402146
references.citation: Neuroradiology. 1996 Jan;38(1):38-40
references.pmid: 8773273
references.citation: Clin Imaging. 1996 Apr-Jun;20(2):85-90
references.pmid: 8744814
references.citation: J Neuroradiol. 1990;17(4):303-18
references.pmid: 2092089