Presentations 2020: OMFS

351 - A case of a rare lip schwannoma.

L Brooks J Catania A Sugar
Presented by: Laura Brooks
Morriston Hospital

Introduction: Schwannomas are slow growing neoplasms which can be benign or malignant and originate from the Schwann cells that surround the peripheral, cranial or autonomic nerve sheaths. Approximately 25-40% of schwannomas occur in the head and neck region, however only 1% originate from the oral cavity. The tongue is the most common intraoral site followed by the palate and buccal mucosa. Schwannomas of the lip are a rare clinical entity. Only 19 benign lip schwannomas and 2 cases of malignant schwannomas have been reported in the literature. Recurrence is likely with lip schwannomas. Benign lesions have a recurrence rate of 5.3%, however this increases to 100% with malignant schwannomas. Case report: This case describes a 43 year old gentleman, who was referred to the Maxillofacial Department by his GP regarding a painless lump on the inside of his lower left lip. It had been present for 14 years with a slow increase in size. An examination revealed a 2 x 2cm firm smooth lump, which was palpable orally and facially. The provisional clinical diagnosis of a benign minor salivary gland tumour was established and an excisional biopsy completed. Histopathological analysis revealed the final diagnosis as a benign schwannoma. On review 6 weeks later, there was mild paraesthesia of the mental nerve although this had improved since surgery. He is on a 3 monthly follow up to monitor for recurrence. Conclusion: Although very rare, a schwannoma should be considered in the differential diagnosis of a lower lip swelling. Surgical removal is the treatment of choice and the prognosis of a benign schwannoma is favourable.
Consent Statement: Written informed consent for publication of their clinical details and/or clinical images was obtained from the patient/parent/guardian. A copy of the consent form is available for review by the the meeting organisers..

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