Chemical Depressor Myectomy With Botulinum Toxin Type A for the Treatment of Transient Paralysis of the Marginal Mandibular Branch of the Facial Nerve Following Laser-Assisted Liposuction of the Neck

Asymmetry of the lower lip may be the result of injury to the marginal mandibular branch of the facial nerve, which can cause both psychological and functional impairment. Various etiologies, such as congenital anomalies, trauma, iatrogenic injury following rhytidectomy or surgery for oromandibular neoplasms, and idiopathic facial palsy can result in paralysis of the marginal mandibular branch of the facial nerve. We report the successful management of transient marginal mandibular nerve palsy associated with laser-assisted liposuction of the neck using chemical depressor myectomy of the nonparalyzed, contraleteral depressor anguli oris muscle with botulinum toxin type A injection.