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Case Reports in Otolaryngology
Volume 2017, Article ID 3107362, 2 pages
https://doi.org/10.1155/2017/3107362
Case Report

A Lip Lump: An Unexpected Histological Diagnosis of a Lip Schwannoma

1Bradford Teaching Hospitals NHS Foundation Trust, Bradford BD9 6RJ, UK
2Bradford Teaching Hospitals NHS Foundation Trust, University of Leeds, UK

Correspondence should be addressed to Thomas Haigh; ku.oc.liamtoh@hgiah_t

Received 20 September 2016; Revised 1 November 2016; Accepted 17 November 2016; Published 7 February 2017

Academic Editor: Andrea Gallo

Copyright © 2017 Thomas Haigh et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Schwannomas are benign nerve sheath tumours arising from Schwann cells. They comprise 1% of all benign tumours. In the 2016 World Health Organisation Classification of Central Nervous System, they are classified as a tumour of the cranial and paraspinal nerves, Schwannoma 9560/0. A 23-year-old Caucasian lady presented with a seven-month history of a painless right upper lip lump. Examination revealed a small cystic 0.5 cm diameter lesion within the right upper lip. The clinical impression was that of a mucocele. Excision of the lip lesion was performed under local anaesthetic. Histological examination of the excised lesion demonstrated a circumscribed nodule consisting of spindle cells mixed with vascular spaces containing red blood cells and fibrin. Immunohistochemistry for S100 was strongly positive. The findings were consistent with that of a small benign schwannoma. The current consensus is for surgical excision of a conservative nature with no need for margins. If recurrence does occur one needs to consider whether complete enucleation was achieved or whether malignant transformation has occurred.