Schwannoma arising from intramasseteric region.
Schwannoma in the head and neck is usually arising in the parapharyngeal space, but intramasseteric schwannoma is very rare. We report a schwannoma arising from masseter muscle in a middle-aged woman, who presented with a history of a painless right cheek mass for 3 years. Computed tomography scan suggested that the mass was located within the masseter muscle. Fine-needle aspiration was performed and showed spindle neoplastic cells, which were suspected to be of mesenchymal tissue origin. The mass was completely resected under general anesthesia. It was a well-circumscribed and lobulated mass, 4 × 3 × 2 cm in size. Histological examination gave the diagnosis of schwannoma, which was also confirmed by immunohistochemical stainings for S-100 and vimentin. Neurologic sequelae and recurrence were not found at 2 years after surgery.
Department of Oral and Maxillofacial Surgery, School of Medicine,Shanghai Jiao-tong University, Shanghai Ninth People's Hospital, Shanghai, China.
Yue
Y
He
Hong Hai
HH
Fu
Jie
J
He
Han Guang
HG
Zhu
Zhi Yuan
ZY
Zhang
D044963:Biopsy, Fine-Needle; D002610:Cheek / Q000473:pathology; D003937:Diagnosis, Differential; D005260:Female; D006391:Hemangioma / Q000175:diagnosis; D006801:Humans; D007150:Immunohistochemistry; D008406:Masseter Muscle / Q000473:pathology*; D008875:Middle Aged; D019042:Muscle Neoplasms / Q000175:diagnosis*; D009442:Neurilemmoma / Q000175:diagnosis*; D009418:S100 Proteins / Q000032:analysis; D014057:Tomography, X-Ray Computed; D014746:Vimentin / Q000032:analysis
D009418:S100 Proteins; D014746:Vimentin