Case ReportIncidental papillary thyroid carcinoma in thyroglossal duct cyst case report

•The differentiated thyroid carcinoma in thyroglossal cyst is a rare entity.•The incidence is 1 to 2%.•Usually their clinical presentation is indistinguishable from a benign lesion and postoperative definitive diagnosis.•The thyroglossal cyst is found in 7% of the population.•Papillary carcinomas have favorable prognosis and cervical or distant metastases are rare.

IntroductionThe thyroglossal cyst is found in 7% of the population and the incidental papillary thyroid carcinoma in thyroglossal cyst is a rare entity with an incidence 1 to 2%. The clinical presentation is indistinguishable from a benign lesion and the histopathological postoperative study defines the diagnosis. Papillary carcinomas have favorable prognosis and cervical or distant metastases are rare. There is now a consensus on the indication of total thyroidectomy, radioablation with iodine and/or suppressive therapy with levothyroxine after being removed surgically [1-3] (Patrucco et al., 2015; Gupta et al., 2014; Choi et al., 2013).Case report46-year-old female patient with an asymptomatic midline neck mass consistent with a thyroglossal cyst. That was excised by Sistrunk's procedure and an intraoperative biopsy that reports papillary carcinoma infiltrating the capsule. It was decide to complete the total thyroidectomy without complications, evolution is consistent and graduated euphonious and no evidence of hypoparathyroidism.DiscussionManagement dilemmas regarding the roles for total thyroidectomy are reviewed in the context of relevant evidence based literature.ConclusionThe initial evaluation of carcinoma of thyroglossal duct cyst includes careful examination, ultrasound and biopsy fine needle aspiration. Sistrunk's procedure is adequate treatment for thyroglossal cyst but find another diagnosis as papillary thyroid carcinoma makes us continue with a total thyroidectomy after discuss the case with experts [4,5] (Tharmabala and Kanthan, 2013; Miranda-Aguirre et al., 2008).