For patients who experience recurrence after thyroid surgery, the possibility of PPS metastasis should be considered. In this series, all patients with PPS metastasis also had previous unilateral or bilateral cervical metastasis. Despite curative attempt, most patients experienced local or distant recurrence.
Invasive extranodal extension did not affect the survival of patients with PTC. Despite a negative impact on distant recurrence, invasive extranodal extension did not affect locoregional recurrence in PTC patients.
The present results indicate excellent locoregional control rates following upper MD, while major complications such as arterial breakdown were rare. It is suggested that upper MD may be an essential and adequate procedure for patients with Ce or Ce/Ut tumors, and may also be required for cases of HPC with a T4 primary to improve locoregional control of the disease.
Our results indicate that most patients with RLN invasion by LNM did not experience preoperative vocal cord paralysis. LNM invasion of the RLN (70%) more often occurred on the right side as expected given the complexity and three-dimensional anatomy of the RLN in the right paratracheal region compared to the left. RLN invasion by LNM should be considered if preoperative paratracheal nodal disease, especially when bulky, is noted in the right paratracheal region.
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