Primary Extracranial Meningioma of the Temporal Region with Oral Extension: A Case Report and Literature Review
摘要
Meningiomas are common benign intracranial neoplasms, but their extracranial manifestations are exceedingly rare, comprising only 1–2% of all meningiomas. Primary extracranial meningiomas (PEMs), particularly those originating in the temporal region with oral cavity extension, are extremely uncommon. This case report details such a presentation and reviews relevant literature.
Case PresentationA 60-year-old female presented with a 6-year history of a gradually enlarging, painless swelling on the right side of her face. A previous history of trauma to the temporal region and subsequent intraoral trauma were noted. Examination revealed a 9.5 × 5 cm dumbbell-shaped, soft, immobile mass extending from the temporal to the buccal region without neurological deficits. MRI demonstrated a homogeneously enhancing extracranial lesion without intracranial extension. Fine-needle aspiration cytology and histopathology confirmed the diagnosis of meningioma. Surgical excision was performed via a combined transfacial and transoral approach, ensuring facial nerve preservation and complete tumor removal. No recurrence was observed at the 2-year follow-up.
DiscussionPEMs are believed to arise from ectopic arachnoid cells, possibly displaced by trauma or other mechanisms. The current case is classified as Type C according to Hoye's classification, denoting primary ectopic meningioma without cranial connection. Immunohistochemistry typically reveals positivity for EMA and vimentin. Literature suggests a generally favorable prognosis with complete surgical excision, though recurrence rates of up to 23.6% have been reported.
ConclusionThis case represents a unique presentation of PEM with both temporal and oral involvement. Complete surgical resection remains the treatment of choice and is associated with low recurrence risk. PEM should be considered in the differential diagnosis of slowgrowing head and neck masses.