Radical intracapsular microenucleation technique for exclusively intraparotid facial nerve schwannoma: Long-term follow-up review.
OBJECTIVE
To evaluate the efficacy and long-term outcome of radical intracapsular microenucleation technique for the treatment of exclusively intraparotid facial nerve schwannoma (IFNS).


METHODS
From 1996 to 2015, IFNSs closely adherent to the facial nerve without intratemporal involvement were selected for this study. IFNSs were subdivided into an intracapsular microenucleation group and a resection with reconstruction group. Facial nerve function was assessed using the House-Brackmann Grading system. The study sample consisted of 28 patients who were followed up for 5.75 years (range, 1-15 years).


RESULTS
Of the 28 patients, 18 IFNSs were from the main trunk. Radical intracapsular microenucleation was performed in 9 patients, resection with reconstruction in 7 patients, and only biopsy in 2 patients. Nine patients who received intracapsular microenucleation recovered to House-Brackmann Grade I (55.6%) or Grade II (44.4%), in comparison to the 7 patients from resection group (Grade III, 28.6%; Grade IV, 42.9%; Grade V, 28.6%). The other 10 IFNSs from the distal branches maintained favorable nerve function with either of the treatments. Tumor recurrence was not observed except for the two patients with only biopsy.


CONCLUSIONS
Radical intracapsular microenucleation with nerve preservation was a safe and reliable treatment for IFNS, especially for the IFNS from the main trunk.
Department of Oral and Maxillofacial-Head and Neck Oncology, Shanghai Key Laboratory of Stomatology (Head: Chenping Zhang), Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, 639 Zhizaoju Road, Shanghai 200011, PR China.
Zhiwei
Z
Zheng
Department of Oral and Maxillofacial-Head and Neck Oncology, Shanghai Key Laboratory of Stomatology (Head: Chenping Zhang), Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, 639 Zhizaoju Road, Shanghai 200011, PR China.
Jun
J
Li
Department of Oral and Maxillofacial-Head and Neck Oncology, Shanghai Key Laboratory of Stomatology (Head: Chenping Zhang), Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, 639 Zhizaoju Road, Shanghai 200011, PR China.
Yi
Y
Shen
Department of Oral and Maxillofacial-Head and Neck Oncology, Shanghai Key Laboratory of Stomatology (Head: Chenping Zhang), Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, 639 Zhizaoju Road, Shanghai 200011, PR China.
Liqun
L
Xu
Department of Oral and Maxillofacial-Head and Neck Oncology, Shanghai Key Laboratory of Stomatology (Head: Chenping Zhang), Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, 639 Zhizaoju Road, Shanghai 200011, PR China. Electronic address: jianjian60@yahoo.com.
Jian
J
Sun
D000293:Adolescent; D000328:Adult; D000368:Aged; D003390:Cranial Nerve Neoplasms / Q000175:diagnosis / Q000473:pathology / Q000601:surgery*; D003951:Diagnostic Errors; D005154:Facial Nerve / Q000503:physiopathology / Q000601:surgery; D005155:Facial Nerve Diseases / Q000175:diagnosis / Q000473:pathology / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000453:epidemiology; D009442:Neurilemmoma / Q000175:diagnosis / Q000473:pathology / Q000601:surgery*; D010306:Parotid Gland / Q000473:pathology / Q000601:surgery; D010307:Parotid Neoplasms / Q000175:diagnosis; D055815:Young Adult
House-Brackmann Grade; Intracapsular microenucleation; Intraparotid facial nerve schwannoma