Use of AlloDerm implant to prevent frey syndrome after parotidectomy.

Abstract

To evaluate the effectiveness of AlloDerm, an acellular human dermal matrix graft, as an interpositional physical barrier to prevent the development of Frey syndrome after parotidectomy. The 30 patients included in the study were divided into 3 groups of 10. In group 1 (study group), patients underwent superficial parotidectomy with placement of an AlloDerm graft (LifeCell Corp, Branchburg, NJ). In group 2 (control) patients had superficial parotidectomy without placement of an interpositional barrier. In group 3 (control), patients underwent deep-plane rhytidectomy without disruption of the parotid fascia. All were evaluated after 1 year and questioned about gustatory sweating. Subjective assessment of Frey syndrome was documented when patients experienced gustatory sweating, even if they were not perturbed by the symptom. The Minor starch-iodine test was performed in each patient for objective assessment. The incidence of subjective Frey syndrome was observed in 1 patient in group 1 and 5 patients in group 2. The incidence of objective Frey syndrome was noted in 2 patients in group 1 and 8 patients in group 2. Both subjective and objective differences in incidence of Frey syndrome were statistically significant. None of the group 3 patients had subjective or objective Frey syndrome. Two patients in group 1 and 3 patients in group 2 developed a transient seroma or sialocele that resolved with conservative management. The use of AlloDerm graft as an interpositional barrier improves parotidectomy outcome by reducing the incidence of Frey syndrome.