title: [A diagnostic pitfall: papillary adenocarcinoma arising in ectopic thyroid tissue within a branchial cyst].
abstract: A case of thyroid papillary carcinoma arising in ectopic thyroid tissue within a branchial cleft cyst is described. Complete dissection of the thyroid gland was necessary to rule out the differential diagnosis of primary thyroid carcinoma. The thyroglossal duct tract is an unusual localization for thyroid carcinomas in ectopic thyroid tissue. Thyroid carcinoma arising in ectopic thyroid tissue within a branchial cyst is extremely rare. Complete thyroidectomy may be necessary to eliminate an occult thyroid carcinoma.
authors.affiliation: Laboratoire de Pathologie Clinique et Expérimentale, Hôpital Pasteur, BP 69, 06002 Nice Cedex, France.
authors.forename: Véronique
authors.initials: V
authors.lastname: Hofman
authors.forename: Sandra
authors.initials: S
authors.lastname: Lassalle
authors.forename: Catherine
authors.initials: C
authors.lastname: Butori
authors.forename: Nicolas
authors.initials: N
authors.lastname: Guevara
authors.forename: José
authors.initials: J
authors.lastname: Santini
authors.forename: Paul
authors.initials: P
authors.lastname: Hofman
mesh_terms: D000230:Adenocarcinoma / Q000473:pathology* / Q000532:radiotherapy; D000328:Adult; D001935:Branchioma / Q000473:pathology* / Q000532:radiotherapy; D002828:Choristoma / Q000473:pathology* / Q000532:radiotherapy; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D013961:Thyroid Gland; D016896:Treatment Outcome