Atypical Imaging Appearances of First Branchial Cleft Anomalies: Two Pathologically Proven First Branchial Cleft Anomalies Containing Fat on Imaging

Branchial anomalies (BA) are developmental lesions that are believed to be either vestigial remnants resulting from incomplete obliteration of the branchial apparatus or the result of buried epithelial cell rests. They are classified as either first, second, third, or fourth according to their proposed pouch or cleft of origin and are relatively common findings.