A Case of Ectopic Thyroid Papillary Carcinoma

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  • 甲状舌管嚢胞に伴う異所性甲状腺癌例
  • 臨床 甲状舌管囊胞に伴う異所性甲状腺癌例
  • リンショウ コウジョウ ゼツカンノウホウ ニ トモナウ イショセイ コウジョウセンガンレイ

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Abstract

Ectopic thyroid tissue is thought to form when the thyroid primordium fails to descend normally. Such tissue is generally considered extremely rare as a malignant tumor site. We report a case of an ectopic thyroids becoming such a site.<br> A 57-year-old man had an anterior neck tumor diagnosed in computed tomography (CT) as a thyroglossal duct cyst. The tissue was surgically resected using the Sistrunk’s procedure when ectopic thyroid papillary carcinoma was identified within the cyst. Thyroid gland morphology was normal and no sign of lymph node metastasis was detected, therefore no further resection was done. Examination of the patient 3 year and 8 months postoperatively showed that the man had no evidence of tumor recurrence or lymph node metastasis.<br> Given ectopic thyroid development within a thyroglossal duct cyst and its susceptibility to malignant tumor formation, we strongly advise that ectopic tissue pathology be closely studied to address this potential malignancy.<br>

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