A retrospective review was made of the medical records of 17 patients, who had branchial cyst, sinus or fistula, and who had been admitted to Kanazawa University Hospital during the 11-years from October, 1977 to 1988. Clinical information was obtained from clinic and office records. The following results were obtained:
1) The sex distribution was 8 males and 9 females, and age distribution was between 6 and 72 years old.
2) Three sinuses were found to be open at the anterior border of the sternocleidmastoid muscle, and 13 sinuses had no evidence of a tract.
3) A branchial pit which connected with an internal opening at the posterior tonsillar pillar was found.
4) Type I or Type II (Bailey's classification) had a higher incidence of branchial cyst.
5) Pathologically, 16 cysts were lined by stratified squamous epithelium but only one was lined by both stratified squamous and non-ciliated epithelium.
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