Background. Carcinomas arising in the thyroglossal duct cysts are rare, accounting only for about 0.7-1.5 % of all thyroglossal duct cysts. 1-3 Synchronous occurrence of thyroglossal duct carcinoma and thyroid carcinoma is reported to be even rarer.4 Traditionally, surgical treatments of such coexisting thyroglossal duct cyst carcinoma (TGDCa) and papillary thyroid carcinoma (PTC) were typically performed through a single transverse or double incisions on the overlying skin. A longer, extended cervical incision might be required if neck dissection is necessary. Though this method provides the operator with the optimal surgical view, the detrimental cosmetic effect on the patient of possessing a scar cannot be avoided, despite the effort of the surgeon to camouflage the scar by placing the incision in natural skin creases. Recently, the authors have previously reported the feasibility of robot-assisted neck dissections via a transaxillary and retroauricular ("TARA") approach or modified face-lift approach in early head and neck can-cers.5,6 On the basis of the forementioned surgical technique, we demonstrate our novel technique for robotassisted Sistrunk's operation via retroauricular approach as well as robot-assisted neck dissection with total thyroidec-tomy via transaxillary approach.
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