Abstract
Intraparotid facial nerve schwannomas are extremely rare neoplasm that presents challenge in diagnosis and management as they are rarely diagnosed preoperatively. We sought to gain insight into clinical presentation, appropriate diagnostic and management modalities which is a matter of debate. Here we present a rare case of intraparotid facial nerve schwannomas diagnosed intra-operatively and managed with surgical excision.
Highlights
Schwannomas are rare, benign, encapsulated neuroectodermal tumours arising from Schwann cells
Among 25-40% of a schwannomas that occur in head and neck region only very few cases originate from facial nerve[1,2]
There is great potential of misdiagnosis and mismanagement when detected intraoperatively with worst consequences of facial nerve palsy. We present this case to highlight the rarity of its occurrence that mimics pleomorphic adenoma, diagnosed only intraoperatively even when cytology and imaging modalities were not helpful in preoperative diagnosis
Summary
Schwannomas are rare, benign, encapsulated neuroectodermal tumours arising from Schwann cells. Majority of facial nerve schwannomas arise from infratemporal part, rarely involves intraparotid part of facial nerve, accounting for 10 % of cases, which typically pres ents as asymptomatic parotid mass[2,3]. It is rarely diagnosed preoperatively because its incidence is rare accounting for 0.2-1.5 % and it mimics pleomorphic adenoma in clinical presentation[3]. There is great potential of misdiagnosis and mismanagement when detected intraoperatively with worst consequences of facial nerve palsy We present this case to highlight the rarity of its occurrence that mimics pleomorphic adenoma, diagnosed only intraoperatively even when cytology and imaging modalities were not helpful in preoperative diagnosis
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