First Branchial Cleft Cyst - On physical examination, the swollen postauricular area was fluctuant and tender (Panel A), and white secretions were observed in the external auditory canal. A computed tomographic scan of the temporal bone (Panels B and C) showed a hypointense cystic fluid collection (yellow arrows) with adjacent inflammation (green arrows) in the perimastoid area. #Clinical #Radiology #CT #BranchialCleftCyst #Branchial #Cleft #Cyst #NEJM