OBJECTIVE: To describe a case of papillary carcinoma of thyroid cysts in the channel tireoglossus to evaluate the surgical approach. CASE REPORT: A female patient of 45 years old, consulted by the anterior and lateral cervical tumor. On physical examination, tumor earlier movil, not painful, inflammatory signs at cervical media that rises and falls with tongue protrusion and another tumor in the region yoke moving average carotid painless without signs of inflammation. There adenopathy. Rest of the physical examination was normal. If the patient underwent a fine needle aspiration of tumor cells that returns without atypia. Sistrunk procedure was performed with subsequent return to tell pathological anatomy of papillary carcinoma of the thyroid cyst thyroglossal channel and subsequently performs thyroidectomy total. CONCLUSION: Given the infrequency of cases of malignant cysts tireoglossus channel, it seemed interesting to expose the case for controversy the decision to complete the surgery with recession of the thyroid gland.