title: A case of squamous cell carcinoma arising from branchial cleft cyst.
abstract: Squamous cell carcinoma throughout the epithelium of a lateral cervical cyst is considered extremely rare. This report describes an additional case of this very rare clinical condition. A 70-year-old man presented with a well-defined, immobile, painless mass in the left neck that was excised with a diagnosis of branchial cyst. Histologic findings of the excised specimen were lateral branchial cyst with high-grade dysplasia and carcinoma of the squamous epithelial lining. The patient was followed for more than 2 years 10 months and no evidence of recurrence or other cancer has been found.
authors: Senior Resident, Department of Oral and Maxillofacial Surgery, Yamaguchi University Graduate School of Medicine, Yamaguchi, Japan.
authors: Asuka
authors: A
authors: Nakano
authors: Associate Professor, Department of Oral and Maxillofacial Surgery, Yamaguchi University Graduate School of Medicine, Yamaguchi, Japan. Electronic address: kmishima@yamaguchi-u.ac.jp.
authors: Katsuaki
authors: K
authors: Mishima
authors: Assistant Professor, Department of Molecular and Developmental Biology, Kawasaki Medical School, Okayama, Japan.
authors: Naoki
authors: N
authors: Katase
authors: Professor and Chair, Department of Oral and Maxillofacial Surgery, Yamaguchi University Graduate School of Medicine, Yamaguchi, Japan.
authors: Yoshiya
authors: Y
authors: Ueyama
mesh_terms: D000368:Aged; D044963:Biopsy, Fine-Needle / Q000379:methods; D001935:Branchioma / Q000473:pathology*; D002294:Carcinoma, Squamous Cell / Q000473:pathology*; D002471:Cell Transformation, Neoplastic / Q000473:pathology; D005500:Follow-Up Studies; D006258:Head and Neck Neoplasms / Q000473:pathology*; D006801:Humans; D008297:Male; D009334:Neck Muscles / Q000473:pathology