title: Papillary adenoma in a lateral cervical cyst.
abstract: A lateral cervical cyst located in the left lower neck and had no connection with the thymus, thyroid or parotid gland has been described. Its origin might be the remnant of thymic duct, since Hassal's corpuscle-like structure was found in the cystic wall, although established thymic tissue could not be detected. The most interesting feature of the cyst was that the lining showed papillary adenoma approximately in one-fifth of the luminar surface, whereas the rest was lined by either cuboidal to columnar, nonciliated epithelial cells or metaplastic squamous epithelial cells. This is the first documented case of papillary adenoma in a lateral cervical cyst of possible thymic duct origin.
mesh_terms: D000328:Adult; D001935:Branchioma / Q000473:pathology*; D003537:Cystadenoma / Q000473:pathology*; D006258:Head and Neck Neoplasms / Q000473:pathology*; D006801:Humans; D008297:Male; D013950:Thymus Gland / Q000473:pathology