Background Numerous prognostic factors have been studied for survival in patients with
papillary thyroid carcinoma (PTC), although there are few multivariate studies that include
the histological variety of PTC. Hypothesis There are prognostic factors that influence
survival in a series of patients with PTC, including the histological variety, and a new
prognostic index (PI) for survival can be formulated by accounting for these factors. Design A
retrospective study. Setting A university hospital department of surgery. Patients Between …