Abstract
This paper reported a case of a branchial cyst accompanied by a scarred incomplete fistula. A 16-year-old woman visited our hospital with a complaint of swelling of the left neck. Physical examination revealed a 60×50mm elastic soft swelling with slight tenderness in the left upper cervical region, and CT examination revealed a low density oval region under the sternocleidomastoid muscle. As a result of puncture, a yellowish mustard-like fluid was obtained and cytodiagnosis of the fluid indicated class II. At removal of the cyst, a scarred incomplete fistula from the cyst adhered to the mastoid process. Histologically, the cyst wall was covered with stratified squamous epithelium and lymph follicles were observed. Two years and 10 months have passed since the operation. The patient's progress is good at present, without any signs of recurrence.
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