[Papillary adenocarcinoma on ectopic thyroid tissue].
OBJECTIVE
To report a case of papillary adenocarcinoma occurring on ectopic thyroid tissue in the hyoid bone region.


METHODS
A 57-year-old patient consulted for a cervical mass appearing 1 year before, with no signs of compression. The thyroid function was normal.


RESULTS
The examination showed a firm tumefaction, fixed on the hyoid bone, with undetermined limits, measuring approximately 8 cm. The thyroid gland was in the normal pretracheal position. The cervical tomodensitometry objectified an osteolytic process centered on the hyoid bone with a fleshy zone of tissue density and calcifications. Cervical MRI provided a more precise assessment of the extension of the mass and confirmed the integrity of the other structures, in particular the endo-larynx. The tumor was totally resected via a cervical approach. The pathologic study suggested a papillary adenocarcinoma on ectopic thyroid tissue. The treatment was completed by a total thyroidectomy with normal histological results.


CONCLUSIONS
Papillary adenocarcinoma on ectopic thyroid is a very rare situation. Its diagnosis is histological. Its treatment is primarily surgical, sometimes associated with radioiodine I-131 therapy.
Dib
N
N
Service d'ORL et de chirurgie cervicofaciale, hôpital des spécialités, CHU de Rabat-Salé, Rabat, Maroc. F.NYA@hotmail.com
Benhammou
A
A
Meziane
M
M
Harmouch
A
A
Nazih
N
N
Essakali
L
L
Kzadri
M
M
Sefiani
S
S
D000231:Adenocarcinoma, Papillary / Q000473:pathology* / Q000601:surgery; D002828:Choristoma / Q000473:pathology* / Q000601:surgery; D003937:Diagnosis, Differential; D006801:Humans; D006928:Hyoid Bone / Q000473:pathology* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D013961:Thyroid Gland; D013965:Thyroidectomy; D014062:Tongue Neoplasms / Q000473:pathology* / Q000601:surgery; D016896:Treatment Outcome