[Magnetic resonance staging accuracy for endometrial carcinoma based on different FIGO staging systems].

Objective: To evaluate MR accuracy for staging endometrial carcinoma with different FIGO staging systems.

Methods: Between August 2006 and July 2010, 95 women underwent surgery for endometrial carcinoma.In each patient, endometrial carcinoma was staged with magnetic resonance (MR) findings based on the old FIGO staging system and then repeated according to the new FIGO staging system for comparisons.Histopathologic findings were used as a golden standard to compare the sensitivity, specificity, accuracy, positive predictive value and negative predictive value.

Results: The accuracy of MRI in the staging of endometrial carcinoma stageI, II and III with the old FIGO staging system were 83.2%, 86.3% and 92.6% versus 88.4%, 96.8% and 91.6% respectively with the new FIGO staging criteria.According the old FIGO staging system, the sensitivity of stage IA, IB and IC were 51.8%, 76.5% and 50.0% and the specificity 85.3% , 55.7% and 95.4% respectively; the sensitivity of stage IIA and IIB were merely 12.5% and 20.0% and the specificity 97.7% and 100.0%.With the new FIGO staging criteria, the above indices were 97.1%, 55.6%, 57.7%, 95.3%, 40.0% and 100.0% respectively.

Conclusion: With new FIGO staging system versus the old one, the accuracy of MR imaging in the preoperative staging of endometrial carcinoma increases.