Review of 602 Microtia Reconstructions: Revisions and Specific Recommendations for Each Subtype.

Background: Congenital microtia is highly variable in its clinical presentation, leading to many technical modifications to and controversies over treatment. The authors evaluated how surgical revisions and interdisciplinary interventions were involved in microtia reconstruction according to each subtype. Methods: Congenital unilateral microtia patients who underwent two-stage microtia reconstruction from June of 2001 to June of 2019 were reviewed. Patient and surgical variables were collected, including the type, number, and timing of surgical revisions, canaloplasty, and jaw operations. Data were presented in relation to each subtype of microtia (i.e., anotia, small/atypical but usable lobule, typical lobule, concha, and scapha). Results: From a total of 602 patients, 407 (67.6 percent) underwent some form of revisions and/or interventions in addition to the two stages of microtia reconstruction, with an average number of 2.2. The majority of small/atypical lobule cases underwent revisions to improve aesthetics, with lobule and inferior sulcus as the most problematic regions. Skin flap necrosis, with an overall rate of 4.0 percent, was most commonly found in the concha type. Except for anotia and small/atypical lobule, nearly one-third of all subtypes underwent canaloplasty, necessitating protective strategies against the circulation-threatening condition. A very small number of jaw operations (up to 7 percent) were performed in all subtypes. Conclusions: Over the two-decade cohort study of microtia reconstruction, revision and interdisciplinary operations were used differently for each subtype. An optimal management plan will be established with respect to type-specific conditions, including the level of difficulty in elevating the subcutaneous pedicle, usable vestige, and later effect of canaloplasty. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, IV.