Abstract
The Dieffenbach flap is often used for post-Mohs reconstruction of auricle defects, effectively restoring the auricle rim. However, its impact on auricle projection and length after division and inset is not well-documented. This study evaluates auricle projection and length following defect repair with the Dieffenbach flap, comparing results to the nonoperative ear. We conducted a retrospective review of patients who underwent a Dieffenbach flap repair surgery at a single institution from 2016 to 2023. Auricle projection and length of the reconstructed ear were measured within the first month following division and inset of the flap and compared with the contralateral ear. A subset of patients had additional measurements > 1 month following division and inset, and these measurements were compared with the contralateral ear. Our study included 23 patients with an average age 67.4 years and 78.3% male. Within 1 month following division and inset, the Dieffenbach flap resulted in a significant decrease in auricle projection (16.5 vs. 18.6 mm, p < 0.05) and length (67.0 vs. 69.7 mm, p < 0.05) compared with the contralateral ear. Subsequent follow-up showed no significant differences in projection (18.5 vs. 18.5 mm, p = 0.98) or length (68.0 vs. 68.7 mm, p = 0.54). Following division and inset of the Dieffenbach flap, auricle projection and length experience initial reduction but subsequently self-correct to match the contralateral ear.
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