Congenital aural atresia and first branchial cleft anomalies: Cholesteatoma and surgical management.

Objectives: To describe the prevalence and significance of first branchial cleft anomalies in children with congenital aural atresia. Methods: Retrospective cohort study and case series. Patients were included if they had ICD-10 code Q16.0, Q16.1, Q16.9, Q17.2, or Q17.9 in their medical record and were seen at UCSF Benioff Children's Hospital from 2012 to 2020 for aural atresia. Children were categorized as having aural atresia and first branchial cleft anomalies if the presence of a first branchial cleft anomaly was noted in otolaryngology provider notes; otherwise, they were categorized as aural atresia alone. Patients with aural atresia and first branchial cleft anomalies were included in the case series. Results: Among 125 children with congenital aural atresia, 5 (4%) were identified with first branchial cleft anomalies. In all cases, an epithelialized tract was noted to originate from the inferior aspect of the middle ear cleft, exiting the temporal bone in an inferomedial position adjacent to the stylomastoid foramen, with a cutaneous exit point inferior to the expected location of the native ear canal. There was no association with sex, microtia grade, or laterality of atresia; however, children with aural atresia and first branchial cleft anomalies were significantly more likely to have syndromes such as Goldenhar and Treacher Collins ( Conclusions: Aural atresia can be associated with comorbid anomalies of the head and neck. First branchial cleft anomalies can be suspected based on characteristic clinical appearance and confirmed with computed tomography showing a typical course through the temporal bone. When present in the context of congenital aural atresia, first branchial cleft anomalies are associated with a significantly increased risk for cholesteatoma, often necessitating surgical management with favorable hearing outcomes. Level of evidence: 4.