Intraparotid facial nerve schwannoma:A case report

摘要

Facial nerve schwannoma occurring within the parotid gland is a rare tumour.We report a case of schwannoma within the parotid gland in a young female patient,who underwent ultrasound and magnetic resonance imaging(MRI)and subsequent surgical excision of the lesion.The lesion showed hyperintensity on T2-weighted and diffusion-weighted MRI.There was no adjacent lymphadenopathy.Although hyperintensity on diffusionweighted MRI could suggest malignant tumours,the characteristic“string sign”provided the clue for the diagnosis of schwannoma.