[Application of facial canal dissection for recovery of facial nerve after operation of parotid carcinoma].
OBJECTIVE
To study the recovery method of facial nerve function and to compare the clinical effect after operation of parotid carcinoma, which invades stylomastoid foramen and peripheral bone in deep lobe.


METHODS
Three operation methods were taken: (1) The tumor, parotid, invasive facial nerve and bone around the tumor were resected with transplantation of facial nerve. (2) Tumor parotid and facial nerve were resected without transplantation of facial nerve. (3) Tumor and parotid were dislocated from facial nerve, keeping the continuity of facial nerve.


RESULTS
For the first method, facial nerve function of 68.2% patients came back to the patients without facial paralysis before operation, while facial nerve function of 16.7% patients came back to the patients with facial paralysis before operation. There was obvious difference between them (P < 0.05). To the patients with facial paralysis before operation, the first and the second method were taken. The ratio of local control was 33.3% and 10.0% respectively. And survival for 5 years were 25.0% and 10.0% respectively. There was no obvious difference between the two methods (P > 0.05). To the patients without facial paralysis before operation, three methods of operation were taken. The ratio of local control was 77.3%, 48.0% and 33.3% respectively. And survival for 5 years were 86.4%, 52.0% and 41.7% respectively. There was obvious difference between the first method and the other two (P < 0.05). There was no obvious difference between the second and the third methods (P > 0.05).


CONCLUSIONS
Facial canal dissection in operation of parotid carcinoma with recovery of facial nerve can not only resect tumor completely, but also fit for development of functional surgery. It is an ideal method for surgery operation.
Han
Si-yuan
SY
Dept. of Oral and Maxillofacial Surgery, the First Affiliated Hospital, China Medical University, Shen-yang 110001, China.
Wang
Yu-xin
YX
Song
Tao
T
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D005154:Facial Nerve / Q000503:physiopathology* / Q000601:surgery*; D005158:Facial Paralysis / Q000601:surgery*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010307:Parotid Neoplasms / Q000601:surgery*; D016896:Treatment Outcome