Medullary thyroid carcinoma: multivariate analysis of prognostic factors influencing survival.

Background: Medullary thyroid carcinoma (MTC) is a rare development of thyroid cancer with a no negligible mortality rate. Our aim was to determine factors that predict outcome in patients with MTC.

Methods: We reviewed the records of all patients with MTC (n=56) who underwent treatment at our institution between January 1990 and December 2000.