[Brachial cyst: a case report].

The Authors present the clinical case of a 41 years old patient, presenting since two years a right cervical swelling, progressively grown up in the last two months with tight-elastic thickness. Pre-operative diagnostic tests suggested the suspect of II branchial arch cyst. By surgery we removed a cystic formation that appeared, at histopathologic exam with a multi-stratified coating, surrounded by lymphoid tissue, organized in germinative centres, compatible with branchial cyst structure.