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Year : 2009  |  Volume : 46  |  Issue : 2  |  Page : 169-170

Outcome of primary papillary carcinoma of thyroglossal duct cyst with local infiltration to soft tissues and uninvolved thyroid

1 Radiation Medicine Centre (BARC), Mumbai-400 012, India
2 Department of Pathology, Tata Memorial Hospital, Parel, Mumbai-400 012, India

Correspondence Address:
S Basu
Radiation Medicine Centre (BARC), Mumbai-400 012
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0019-509X.49157

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How to cite this article:
Basu S, Shet T, Borges A M. Outcome of primary papillary carcinoma of thyroglossal duct cyst with local infiltration to soft tissues and uninvolved thyroid. Indian J Cancer 2009;46:169-70

How to cite this URL:
Basu S, Shet T, Borges A M. Outcome of primary papillary carcinoma of thyroglossal duct cyst with local infiltration to soft tissues and uninvolved thyroid. Indian J Cancer [serial online] 2009 [cited 2022 Aug 7];46:169-70. Available from:


Primary malignancy of the thyroglossal cyst (TGDC), although presently a well-established clinical entity, is relatively rare, with a reported frequency of ~1 % of all thyroglossal duct cysts. [1],[2] The most frequent histological type is papillary carcinoma (~94% of the cases); only about 6% are squamous cell carcinomas. [1] There have been few reports of synchronous papillary and squamous cell carcinoma. [3],[4] Because of its rarity, a considerable difference in opinion remains regarding the mode of management. The concept of de novo origin of primary TGDC carcinoma and excellent outcome of limited surgery in low-risk patients, in the presence of a clinically and radiologically normal thyroid gland, advocates a Sistrunk procedure only as the optimal approach in this setting.

In this communication, a 45-year-old male with a papillary carcinoma of TGD Cyst with infiltration into the surrounding soft tissue in the neck is presented, who underwent a Sistrunk excision of his TGD cyst first and a total thyroidectomy and postoperative radioiodine therapy subsequently. The histpathology of the excised cyst was found to be papillary thyroid carcinoma in the thyroglossal cyst with infiltration into the surrounding extrathyroidal soft tissues [Figure 1].

A diagnostic 131 I uptake and scan [Figure 2] revealed multifocal tracer uptake in the neck with a 24 h neck uptake of 3.19%. In view of the age, sex, and histopathology, showing that the disease had spread into the surrounding tissues, the patient was treated with 5550 MBq (150 mCi) 131 I and was subsequently put on thyroxin supplementation. Follow-up of the whole body survey six months after residual ablation did not reveal any abnormal focal uptake in the body. The serum thyroglobulin levels in his subsequent four follow-up visits were undetectable and he was disease-free at the end of eight years.

The 131- I scan revealing multifocal tracer uptake in the neck (24 h neck uptake calculated to be 3.19% of the dose)

The case draws attention to the following important issues in the management of primary TGDC carcinoma:

(a) The de novo origin of the disease is reiterated as a diligent search in the histological sections following total thyroidectomy, which did not yield any disease focus in the thyroid gland.

(b) The local infiltration to the surrounding soft tissues opens up an important question: Whether the thyroid should be removed, even if it is clinically and radiologically normal?

The first step of optimal management will include risk assessment in the line of differentiated thyroid carcinoma, a careful pre- and intraoperative evaluation of the thyroid gland and neck for potential disease involvement that would necessitate thyroidectomy and lymph node dissection. A microscopic focus of papillary carcinoma, without cyst wall invasion, can be managed by a Sistrunk procedure. Treatment of all other TGD papillary carcinomas should include addition of thyroidectomy followed by radioactive iodine treatment, which renders the following advantages: (a) its implication for performing 131 I scintigraphy both in clinically diagnosing the inapparent disease foci as well as treating recurrence in the initial and follow-up visits, which is significantly higher in the high-risk patients, with advanced disease, (b) reliability of thyroglobulin estimation in subsequent disease monitoring overall and, (c) an excellent outcome achieved following 131 I therapy.

 » References Top

1.Motamed M, McGlashan JA. Thyroglossal duct carcinoma. Curr Opin Otolaryngol Head Neck Surg 2004;12:106-9.  Back to cited text no. 1  [PUBMED]  [FULLTEXT]
2.Yang YJ, Haghir S, Wanamaker JR, Powers CN. Diagnosis of papillary carcinoma in a thyroglossal duct cyst by fine-needle aspiration biopsy. Arch Pathol Lab Med 2000;124:139-42.  Back to cited text no. 2  [PUBMED]  [FULLTEXT]
3.Kwan WB, Liu FF, Banerjee D, Rotstein LE, Tsang RW. Concurrent papillary and squamous carcinoma in a thyroglossal duct cyst: A case report. Can J Surg 1996;39:328-32.  Back to cited text no. 3  [PUBMED]  
4.Vijay R, Rajan KK, Feroze M. Inapparent twin malignancy in thyroglossal cyst: Case report. World J Surg Oncol 2003;27:15.  Back to cited text no. 4    


  [Figure 1], [Figure 2]

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