PRIMARY
CARCINOMA OF A THYROGLOSSAL DUCT CYST (TGDC) – IS THYROIDECTOMY INDICATED?
Carcinoma
of the TGDC is extremely rare (< 1 %). Coexistent thyroid cancer is present
in a significant percentage (from 10 % up to 60 %) of these patients.
Therefore, one must be sure that the carcinoma arose within the cyst and is not
a cystic metastasis to a midline lymph node from a primary thyroid cancer or a pyramidal
lobe papillary thyroid cancer. When thyroid ultrasonography shows a normal thyroid
gland and in the absence of cervical lymphadenopathy, resection with the
Sistrunk procedure is adequate treatment and concomitant thyroidectomy is no necessary.
Thyroidectomy should be performed:
I.In the
presence of thyroid malignancy or when thyroid malignancy cannot be excluded
II.In the
rare cases that have invasive tumor or positive regional lymph nodes (in the anticipation
of the need for I-131 treatment and diagnostic whole-body radionuclide imaging
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