Clinical Characteristics and Long-term Outcomes for Parapharyngeal Metastases of Well-Differentiated Thyroid Cancer During 131 I Therapy and Follow-up.

I avidity, age at initial PPM diagnosis, and maximal size of PPM at the end of follow-up. Age of ≥55 years at initial diagnosis of PPM and the presence of concomitant distant metastasis were independently associated with poor survival. This article is protected by copyright. All rights reserved.