Abstract
A 4-year-old female child with complaint of painless swelling in the right side of the neck was reported and it was pre-operatively diagnosed as a branchial cleft cyst from the basis of the clinical course and macroscopic appearance of the neck mass. A cervical cystic tumor was extirpated under general anesthesia. Pathological examination showed normal thymus tissue, cholesterol clefets and granulomas containing Hassal's corpuscels in the wall.
Seventeen cases in Japanese literatures was reviewed and discussed briefly.
