1Hill LM, Connors- Beatty DJ, Nowar A, et al. The role Of ultrasonography in the detection and managemenet of adnexal masses during the second and third trimesters of pregnancy. Am J obstet Gynecol, 1998,179:703 ～ 707.
2Whitecar P, Turner S. Higby K. Adnexal masses in pregnancy A review of 130 cases undergoing surgical management. Am J Obstet Gynecol, 1999,181:19～24.
3Cunningham FG, MacDonald PC, Gant NF. Neoplastic diseases. In:Williams Obstetrics 20 th ed. Newjersery Prentice - Hall International Inc, 1997,1281.
