A case of papillary carcinoma arising in ectopic thyroid tissue within a branchial cyst with neck node metastasis.
ABSTRACT We describe the interesting case of a young man who presented with a lateral neck node that was diagnosed as a branchial cyst. Histopathology of the excised node revealed that a papillary carcinoma was located within thyroid tissue, which in turn was located within a branchial cyst. A total thyroidectomy with local lymph node clearance was performed. Histology identified a normal thyroid gland, but a papillary carcinoma in one of the excised lymph nodes was consistent with a metastasis. To our knowledge, this is only the second reported case of a thyroid carcinoma arising in ectopic thyroid tissue that metastasized in the neck.
SourceAvailable from: Douglas S Ruhl[Show abstract] [Hide abstract]
ABSTRACT: We report a rare case of papillary thyroid carcinoma incidentally found within a branchial cleft cyst. Only four other cases have been described in the literature. A total thyroidectomy and selective neck dissection was performed, and no evidence of occult primary disease was found after review of fine sections. Branchial cleft cysts are the most common lateral neck masses. Ectopic thyroid tissue within a branchial cleft cyst is an unusual phenomenon, and papillary thyroid carcinoma arising from this tissue is extremely rare. Clinicians are left with a diagnostic dilemma when presented with thyroid tissue neoplasm within a neck cyst in the absence of a thyroid primary-is this a case of metastatic disease with a missed primary or rather carcinoma arising in ectopic thyroid tissue? A thorough discussion of the etiologies of these lateral neck masses is reviewed including the embryogenesis of thyroid tissue in a branchial cleft cyst. The prognosis of patients with papillary thyroid carcinoma in lateral neck cysts without a primary site identified appears to be good following excision of the cyst and total thyroidectomy. Other management recommendations regarding these unique lateral neck malignancies are also presented.01/2013; 2013:405342. DOI:10.1155/2013/405342
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ABSTRACT: Objective: To review the diagnosis of primary papillary carcinoma of ectopic thyroid tissue within branchial cleft cysts, and to discuss the diagnostic challenge of differentiating this condition from metastatic disease when an occult microcarcinoma is found in the thyroid gland. Methods: These comprise a case report and a literature review. We present the case of a 75-year-old woman with papillary thyroid carcinoma within the wall of a recurrent, 15 cm, lateral neck cyst. Results: Histological examination of the patient's thyroid gland found a 0.5 mm papillary thyroid microcarcinoma. Conclusion: Our differential diagnosis was primary papillary carcinoma arising from ectopic thyroid tissue, or metastatic cystic degeneration of a lateral lymph node. We make an argument for the former.The Journal of Laryngology & Otology 06/2013; DOI:10.1017/S0022215113001205 · 0.70 Impact Factor
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ABSTRACT: Ectopic thyroid glands generally occur in the midline as a result of abnormal median migration. The presence of these ectopic glands, lateral to the midline is rare. Here, the authors present one case of papillary carcinoma of thyroid arising from an ectopic thyroid tissue in branchial cleft cyst presented as a swelling in lateral neck diagnosed after cystectomy. Total thyroidectomy and neck dissection were done to rule out occult primary carcinoma of thyroid. Histopathology report showed thyroid and lymph nodes were normal.Case Reports 07/2012; 2012. DOI:10.1136/bcr.02.2012.5783