Table 2.

Types of Surgery in the Included Studies, With Cited Incidence Rates of FP

Surgery by location of facial nerve	Description	Patients, No. (%) (N = 313)	Reported incidence rate of FP in the literature
Extratemporal	Includes parotidectomy, face-lift, TMJ arthroplasty, styloidectomy, facial fracture repair	170 (54)	“Incidence of immediate post-parotidectomy facial nerve dysfunction [approaches as high as] 14.5% of permanent deficits”30(p461) “Incidence of facial nerve palsy after orthognathic surgery…reported to be in the range of 0.17% to 0.75%”32(p1615)
Temporal	Includes mastoidectomy, cochlear implantation, lateral temporal bone resection	4 (1)	“Transient palsy…reported to range from 5% to 33%…permanent [FP] …reported to occur in 2% of cases [after implanting Esteem middle ear devices]”33(p429) “Rates [of FP] reported to be 0.6–3.7% for primary tympanomastoidectomy and 4–10% for revision tympanomastoidectomy”1(p260)
Intracranial	Includes approaches for acoustic neuroma/vestibular schwannoma resection (translabyrinthine, retrosigmoid craniotomy, middle fossa craniotomy); middle fossa approach for temporal bone CSF leak or meningocele repair	126 (40)	“Immediately after removal of a vestibular schwannoma or neuroma of the acoustic nerve, various degrees of facial nerve palsy arise in 20–70% of patients”8(p58)
Incomplete reportinga	NA	13 (4)	NA

Abbreviations: CSF, cerebrospinal fluid; FP, facial paralysis; NA, not applicable; TMJ, temporomandibular joint.

^aIncomplete reporting refers to patients for whom the type of surgery was not specifically stated.