3Harken AH. Moore EE.美国最新临床医学问答.香港.海洋出版社,1999.265.
4Bernstein WC. What are hemorrhoids and what is their relationship to the portal venous system? Dis Colon Rectum, 1983,26:829.
5Keighley MRB, Willams NS. Surgery of the Anus, Rectum and Colom. London : Saunders, 1993. 295.
6Thomson WHF. The nature of haemorrhoids. Br J Surg, 1975,62:542-552.
7McCormaok TT,Bailey HR,Simms JM,et al, Rectal varices are not piles. Br J Surg, 1984,71: 163.
8Weinshel E, Chen W, Falkensfin DB, et al, Hemorrhoids or rectal varices: Defining the cause of massive rectal hemorrhage in patients with portal hypertension. Gastroenterology, 1986,90 : 744-747
9Williams PL, Warwick R, Dyson M, eds. Gray's Anatomy.37th ed. London :Churchill Livingstone, 1989.1369
