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INTRODUCCIÓN: Los quistes tiroglosos son las lesiones más comunes de la línea media cervical y se ha descrito el carcinoma papilar de tiroides en el 1%. Debido a su baja incidencia no existe un consenso acerca del tratamiento óptimo. Caso clínico: Paciente mujer de 34 años de edad consulta por aumento de volumen cervical doloroso y se evidencia nódulo doloroso en región cervical media. Ecografía de tiroides visualiza una lesión quística compleja. Se completa el estudio con tomografía computada del cuello con contraste que evidencia quiste del conducto tirogloso con compromiso inflamatorio-infeccioso, por lo que se decide cirugía. Biopsia evidencia cáncer papilar de 0.25 cm en quiste del conducto tirogloso, con bordes quirúrgicos negativos. Por bajo riesgo se decide control imagenológico estricto. DISCUSIÓN: Los quistes del conducto tirogloso comprenden las lesiones cervicales congénitas más frecuentes. Se presentan como masas indolentes y asintomáticas. El diagnóstico es confirmado mediante ecografía y la tomografía es utilizada para ampliar el estudio. La aparición de cáncer tiroideo en estos quistes es poco común, y generalmente son indistinguibles de las lesiones benignas en el preoperatorio. En relación al manejo del cáncer papilar en quiste del conducto tirogloso no existe un consenso de su tratamiento óptimo. Para los casos de bajo riesgo se sugiere control anual con TSH y ecografía tiroidea. Para aquellos pacientes de alto riesgo se sugiere tiroidectomía total y ablación de los restos tiroides con yodo radioactivo, con control anual con niveles de tiroglobulina. El pronóstico es excelente, con tasas de remisión que superan el 95%. CONCLUSIONES: Los carcinomas en quistes de conducto tirogloso son poco comunes y en la mayoría de los casos son lesiones diagnosticadas de manera incidental después de la resección quirúrgica. Para definir necesidad de tiroidectomía, debe realizarse estudio individualizado por un equipo multidisciplinario con amplia experiencia.

INTRODUCTION: Thyroglossal cysts are the most common affection of the cervical midline. Papillary carcinoma has been described in 1% of this cysts. Due to its low incidence a consensus on the optimal treatment does not exist. Clinical case: A 34 year old female with no relevant past medical history, presented with a painful cervical mass of many weeks of appearance. The thyroid ecography showed a complex cystic lesion and the cervical computed tomography with contrast evidenced a cyst of the thyroglossal duct with inflammatory and infectious findings. Surgery with no incidents was performed. Biopsy reported a 0.25 cm papillary cancer in the thyroglossal duct cyst, with negativa surgical margins. Strict follow up with imaging studies was decided. DISCUSSION: the thyroglossal duct cyst are the most common congenital cervical affections. Classically, they present as indolente, asyntomatic masses on the cervical midline. The diagnosis is confirmed with ecography and computed tomography is used to extent evaluation. Thyroid cancer in thyroglossal duct cyst is uncommon and generally indistinguishable from benign lesions in the preoperative phase. A consensus regarding the optimal management of this patients does not exist. For low risk cases, an anual control with THS and thyroid ecography is suggested. For patients with high risk a Sistrunk with total thyroidectomy and radioactive ablation of thyroids remnants is recommend. Follow up with anual thyroglubin levels should be performed. The prognostic is excellent, with more than 95% remission rates. CONCLUSSIONS: Thyroglossal duct cyst carcinomas are rare. In most cases, diagnosis is made incidentally after surgical resection. To decide wheter thyroidectomy is necessary each case should be analyzed individually by a multidisciplinary team with vast experience.

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Abstract Introduction Thyroglossal duct cyst (TGDC) is themost common congenital anomaly of the neck, and approximately 7% of all the adult population presents it. Ectopic thyroid tissue is found in the thyroglossal duct cyst wall in up to 65% of cases. This thyroid tissue has the potential to develop some type ofmalignancy, themost common of which is the papillary carcinoma of the thyroid. There are just over 270 cases of thyroglossal duct cyst malignancy reported in the literature. Objectives We aimed to study our population of patients in order to identify cases with thyroglossal duct cyst malignancy. Methods A retrospective chart review was conducted in the section of otolaryngology/ head and neck surgery at a hospital in Karachi, Pakistan, from January of 2004 to December of 2014 on patients with the diagnosis of thyroglossal duct cyst. Results Fifty-eight patients were diagnosed with TGDC, two of whom also presented with thyroglossal duct cyst carcinoma. Both patients revealed papillary thyroid carcinoma on histopathology. Case 1 had an open biopsy before undergoing definitive surgery. Both patients underwent subsequent total thyroidectomy after Sistrunk procedure, and case 2 had selective neck dissection revealing lymph node metastasis. Conclusion Thyroglossal duct cyst carcinoma is a rare finding that comes as a surprise to both the patient and the surgeon. We report 2 out of 58 cases diagnosed with thyroglossal duct cyst carcinoma.

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Cisto do Ducto Tireoglosso é a mais comum das patologias congênitas de linha média. Sua origem ocorre a partir da permanência de remanescentes epiteliais do trato tireoglosso durante o período embrionário. A localização mais comum do cisto é na linha média (ou ligeiramente fora da linha média) entre a tireóide e o osso hioide ou logo abaixo do osso hioide. Pode haver o desenvolvimento dos cistos em qualquer idade, porém há um maior índice de diagnósticos entre 10 e 20 anos. Um cisto tireloglosso pode se desenvolver em qualquer lugar ao longo de um ducto tireoglosso, embora cistos dentro da língua ou no chão da boca sejam raros. A localização ectópica, principalmente em assoalho bucal, é pouco citada na literatura. O procedimento cirúrgico de Sistrunk é indicado como o tratamento de escolha para a remoção do cisto, apresentando um baixo índice de recorrência. O presente trabalho teve como objetivo realizar uma breve revisão de literatura sobre o Cisto do Ducto Tireoglosso e relatar um caso clinico atípico de cisto do ducto tireoglosso localizado em assoalho bucal (AU).

Thyroglossal duct cyst is the most common of midline congenital pathologies. Its origin occurs due to the presence of epithelial remnants in the thyroglossal duct during the embryological formation. The most common location of a thyroglossal cyst is the midline (or slightly off midline), between the thyroid and the hyoid bone or just below the hyoid bone. These cysts can appear at any age, however there are greater number of cases reported between ten and twenty years old. A thyroglossal cyst can develop anywhere along a thyroglossal duct, although cysts within the tongue or in the floor of the mouth are rare. The ectopic localization, mainly in the buccal floor, is little mentioned in literature. Sistrunk surgical procedure is accepted as the operation of choice for thyroglossal duct cysts, with a lower recurrence rate. This report aims to present a brief review of literature on Thyroglossal Duct Cyst and reports an atypical clinical case of thyroglossal duct cyst located in the buccal floor (AU).

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Introduction: In about 1-2 percent of cases of thyroglossal cyst may be neoplastic changes, mostly correspond to papillary thyroid carcinoma (75-85 percent). The aim of this paper is to present 9 cases of papillary thyroid carcinoma in thyroglossal duct cyst. Materials and Methods: Data were recorded retrospectively from patients diagnosed with papillary thyroid carcinoma in thyroglossal duct cyst treated at Hospital Clínico Universidad de Chile between 1999 2014. Results: From 142 cases operated for thyroglossal duct cyst, 9 cases of papillary cancer (6.34 percent) were recorded. The average age was 32 years. The average diameter of the lesion was 4.4 cm (SD 2.2 cm). 8 patients underwent total thyroidectomy; a simultaneous thyroid cancer was diagnosed in 3 of them. In 6 cases was added iodine therapy. In only one patient a lymph nodal dissection was performed. We do not observe any surgical complication. A solid component in preoperative ultrasonographic study is suspicious of malignancy. The average follow-up time was 85 months. There is no recurrence or mortality in this group of patients. Conclusions: Although the safest long term management is Sistrunk surgery associated with thyroidectomy and radioiodine in selected cases, these patients must be evaluated by a multidisciplinary group and thyroidectomy should be considered in high surgical volume center, in order to minimize complications.

Introducción: En alrededor de 1-2 por ciento de los casos de quiste tirogloso pueden existir cambios neoplásicos, en su mayoría corresponden a carcinoma papilar de tiroides (75-85 por ciento). El objetivo de este trabajo es presentar 9 casos de carcinoma papilar de tiroides en quiste del conducto tirogloso, en cuanto a su forma de presentación y manejo. Material y Método: Se registraron en forma retrospectiva datos de pacientes condiagnóstico de carcinoma papilar de tiroides en quiste del conducto tirogloso atendidos en el Hospital Clínico de la Universidad de Chile entre 1999 2014. Resultados: De 142 casos de pacientes operados por quiste del conducto tirogloso, se registraron 9 casos de cáncer papilar (6,34 por ciento). El promedio de edad de los pacientes fue de 32 años. El diámetro promedio de la lesión fue de 4,4 cm (DS 2,2 cm). Del total, 8 pacientes fueron sometidos a tiroidectomía total, se diagnosticó cáncer de tiroides en 3 de ellos, en 6 se asoció tratamiento con radioyodo. En sólo 1 paciente se realizó una disección linfonodal. El tiempo promedio de seguimiento fue de 85 meses; a la fecha la serie no ha presentado recurrencia ni mortalidad. Conclusiones: Si bien el manejo más seguro a largo plazo es la cirugía de Sistrunk, asociado a una tiroidectomía y eventual radioyodo, la resolución quirúrgica con tiroidectomía asociada debe ser considerada cuando la morbilidad no sea mayor que el beneficio teórico.

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Antecedentes: el carcinoma diferenciado de tiroides en quiste tirogloso (CaQT) es una entidad rara. La incidencia de CaQT es de 1 a 2%. Usualmente su forma de presentación clínica es indistinguible de una lesión benigna y el diagnóstico definitivo es postquirúrgico. No hay en la actualidad un consenso sobre la indicación de tiroidectomía total, radioablación con iodo y/o terapia supresiva con levotiroxina luego de ser extirpado quirúrgicamente...

Introduction: the development of well -differentiated thyroid carcinoma in thyroglossal duct cysts (TGDCa) is uncommon. The incidence of TGDCa lies within 1 to 2%. Usually the clinical appearance is indistinguishable from a benign thyroglossal duct cyst. The definitive diagnosis is post-operative. After the surgery of choice, the other alternative treatments such as thyroidectomy, radioiodine and L-T4 therapy are controversial...

Antecedentes: o carcinoma diferenciado de tireoide em cisto tirogloso (CaQT) é uma entidade rara. A incidência de CaQT é de 1 a 2 por cento. Em geral, a sua forma de apresentação clínica é indistinguível de uma lesão benigna e o diagnóstico definitivo é pós-cirúrgico. Não existe atualmente um consenso sobre a indicação de tiroidectomia total, radioablação com iodo e/ou terapia supressiva com levotiroxina após ser extirpado cirurgicamente...

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Thyroglossal duct cysts are the most common congenital neck masses that develop during childhood. The masses develop from remnants of thyroglossal ducts and typically appear as midline neck masses. Double thyroglossal cysts and the complete failure of the obliterative process of thyroglossal duct are very rare in the literature. This manuscript describes a rare case of double thyroglossal duct, localized above the geniohyoid muscles affecting the floor of the mouth region and sublingual gland. The diagnostic criteria of the tumor and surgical procedure are discussed. To our knowledge, only 3 similar cases were reported in the literature.

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Introducción: El quiste tirogloso es una de las masas cervicales más frecuentes. En 1 por ciento puede desarrollar un cáncer, siendo el más frecuente el carcinoma papilar tiroideo. Objetivo: Describir la presentación clínica, el diagnóstico, el manejo y la evolución de los casos de carcinoma papilar tiroideo en quiste tirogloso. Material y método: Se revisaron los archivos del Departamento de Patología de la Universidad de Concepción desde 2000 a 2010 analizando las fichas clínicas y el informe de la biopsia. Resultados: Se encontraron 4 casos de carcinoma papilar en quiste tirogloso, todos de sexo femenino con un promedio de edad de 42 años. Todos fueron sometidos a la operación de Sistrunk. Dos casos fueron sometidos a tiroidectomía total y terapia con radioyodo complementaria. Sólo un paciente presentaba un cáncer sincrónico en la tiroides. El seguimiento promedio fue de 4,7 años y no se presentaron recidivas. Conclusiones: Se encontraron 4 casos, se analiza su presentación, diagnóstico, tratamiento y evolución.

Introduction: Thyroglossal duct cyst is one the most frequent cervical masses. Cancer may develop from 1 percent among them, thyroid papillary carcinoma being the most frequent. Aim: To describe the clinical presentation, diagnosis, management and evolution of thyroid papillary carcinoma cases in thyroglossal duct cyst. Material and method: A review was made of the files from the department of pathology of the Universidad de Concepción, since 2000 to 2010, analyzing clinical records and biopsy reports. Results: Four cases of papillary carcinoma in a thyroglossal duct cyst were found, all female with a mean of age of 42 years. All of them underwent Sistrunk procedure. Two cases underwent total thyroidectomy and complementary radioiodine therapy. Only one patient presented synchronic thyroideal cancer. The mean time of follow up consisted of 4,7 years, with no reported recurrence. Conclusions: We found 4 cases, his presentation, diagnosis, treatment and evolution was analyzed.

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BACKGROUND: Bronchogenic cysts are rare congenital malformations of ventral foregut development, often with an intrathoracic location. Presentation at the cervical region is very rare. CLINICAL CASE: We present the case of a 29-year-old female who demonstrated a 3-cm medial neck mass in relation to the hyoid cartilage. The mass was painless with a rubbery consistency, moving with tongue movements. Cervical ultrasonography and thyroid scan were suggestive of nonfunctioning thyroglossal cyst. Histopathological examination revealed the presence of a cervical bronchogenic cyst. CONCLUSIONS: Cervical bronchogenic cyst is a rare congenital malformation that usually appears as a painless neck mass. Imaging findings are not specific for differentiating thyroid, thyroglossal, branchial or thymus cyst; therefore, clinical observation of an asymptomatic lateral neck mass in an adult should include the possibility of a bronchogenic cyst in the differential diagnosis.

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