The Use of Botulinum Toxin in the Treatment of a Parotid Duct Injury During Moh's Surgery and Review of Management Options Krishan RS et al. - If a parotid duct injury is diagnosed at the time of tumor extirpation, then surgical repair of the duct should be attempted, but if surgical repair is not possible or if an injury remains unrecognized until well after tumor extirpation, then surgery is not necessary. In such cases, conservative, nonsurgical measures, such as treatment with botulinum toxin, will provide excellent results. [more...]