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Schwannoma of vagus nerve masquerading as a parotid tumour

¹ Department of Radiodiagnosis and Imaging, Kasturba Medical College, Manipal, India; ² Oral Medicine and Radiology, Manipal College of Dental Sciences, Mangalore, India

*Correspondence to: Dr Ajit Auluck, Department of Oral Medicine and Radiology, Manipal College of Dental Sciences, Mangalore – 576104, Karnataka, India; Email: drajitauluck{at}yahoo.co.in

Received 17 April 2005; revised 24 October 2005; accepted 25 November 2005

A post-auricular swelling is the most common presentation of a parotid tumour, the majority of which are benign neoplasms like pleomorphic adenoma. This case report discusses a post-styloid parapharyngeal space tumour presenting as a post-auricular mass which, on initial clinical and cytological examination, was diagnosed as pleomorphic adenoma. A cross-sectional radiological examination revealed the true location of the mass, which was histopathologically confirmed to be a vagal schwannoma. A radiological differential diagnosis is also discussed.

Keywords: schwannoma; vagus nerve; MRI; parapharyngeal space