2SAHNI V A, AHMAD R, BURLING D. Which method is best for imaging of perianal fistul[J].Abdominal Imaging, 2007,33(1):26-30.
3PARS D. Pathogenesis and treatment of fistula in ano[J]. The British Journal of Surgery, 2011,98(1) :2-3.
4YAMAGUCHI T, KAGAWA R, TAKAHASHI H, et al. Diagnostic implications of MR imaging for mucinous adenocarci noma arising i'rom fistula in ano[J]. Techniques in Coloproe- tology, 2009,13 (3) :251-253.
5KAMM M A, NG S C. Perianal fistulizing Crohn's disease: a call to action[J]. Clinical Gastroenterology and Hepatology~ the Oi'fieial Clinical Practice Journal of the American Gastroen terological Association, 2008,6(1) :7-10.
6HALLIGAN S, BUCHANAN G. Mr imaging offistula-in-ano [J].European Journal of Radiology, 2003,47(2) : 98- 107.
7SCHWARTZ D A, LOFTUS E V, TREMAINE W J, et al. The natural history of fistulizing Crohn's disease in Olmsted County, Minnesota[J]. Gastroenterology, 2002,122(4) :875 -880.
10SUN M R, SMITH M P, KANE R A. Current techniques in imaging of fistula in ano.. three dimensional endoanal ultra sound and magnetic resonance imaging[J]. Seminars in Ultra sound, CT, and MR, 2008,29(6):454-471.
5BEYNONJ, MORTENSEN NJ, FOY D M, et al. Pre-opera?tive assessment of local invasion in rectal cancer: digital exa?mination, endoluminal sonography or computed tomography[J]? BrJ Surg , 1986,73:1015-1017.
6HERIOT A G, GMNDY A, KUMAR D. Preoperative staging of rectal carcinoma[J]. BrJ Surg , 1999,86(5): 17-28.
7BlPAT S, GIAS A S, SLAOTS FJ, et a1. Rectal cancer: local staging and assessment of lymph node involvement with en?doluminal US,CT and MR imaging-a meta-analysis[J]. Radi?ology, 2004,232:773-783.
8BESTS-TAN R G, BEETS G L. Rectal cancer: review with emphasis on MR imaging[J]. Radiology, 2004,232: 335-346.
9HAREWOOD G C. Assessment of publication bias in the re?posing of EUS performance in staging rectal cancer[]]. Am] Gastroentero!' 2005,100: 808-816.
10KAUEF W K, PRANTL L, DITTLER HJ, et al, The value of endosonographic rectal carcinoma staging in routine diag- nostics- a 10-year analysis l]]. Surg Endosc , 2004,18: 1075- 1078.
