Prognostic factors determining long-term survival in well-differentiated thyroid cancer: an analysis of four hundred eighty-four patients undergoing therapy and aftercare at the same institution.

Objectives: Identification of the prognostic factors relevant for long-term survival in differentiated thyroid cancer in a homogenously treated patient cohort in order to allow a better initial risk stratification.

Methods: Four hundred eighty-four (358 females/126 males) patients with differentiated thyroid cancer (330 papillary [68.2%]; 154 follicular [31.