Fig. 4
From: Unusual presentation of a first branchial arch fistula with maxillofacial infection: a case report
Intraoperative findings and surgical strategy. A The facial nerve was identified during surgery. The larger tract (red arrow) projecting medially deep within the temporal trunk of the facial nerve (black arrow) and the smaller tract ending at the cartilage of the intertragic notch (white arrow) are shown. B The black arrow indicates the lesion boundary as a blind pouch lying tightly along the masseter. C A suction drain was placed into the tract tunnel after the first branchial cleft anomaly excision. D A specimen containing cartilage post-removal is shown. The complete fistula was approximately 6 cm in length