Int J Colorectal Dis (2012) 27:931–937 21. Cazemier M, Terra MP, Stoker J et al (2006) Atrophy and defects detection of the external anal sphincter: comparison between three- dimensional anal endosonography and endoanal magnetic resonance imaging. Dis Colon Rectum 49(1):20–27 22. Sentovich SM, Blatchford GJ, Rivela LJ et al (1997) Diagnosing anal sphincter injury with transanal ultrasound and manometry. Dis Colon Rectum 40(12):1430–1434 23. Samarasekera DN, Wright Y, Lowndes RH et al (2008) Comparison of vector symmetry index and endoanal ultrasonography in the diag- nosis of anal sphincter disruption. Tech Coloproctol 12(3):211–215 24. Felt-Bersma RJ, Sloots CE, Poen AC, Cuesta MA, Meuwissen SG (2000) Rectal compliance as a routine measurement: extreme volumes have direct clinical impact and normal volumes exclude rectum as a problem. Dis Colon Rectum 43(12):1732–1738 25. Tantiphlachiva K, Rao P, Attaluri A, Rao SS (2010) Digital rectal examination is a useful tool for indentifying patients with dyssynergia. Clin Gastroenterol Hepatol 8(11):955–960 26. Terra MP, Deutekom M, Beets-Tan RG et al (2006) Relationship between external anal sphincter atrophy at endoanal magnetic resonance imaging and clinical, functional, and anatomic charac- teristics in patients with fecal incontinence. Dis Colon Rectum 49 (5):668–678 937 27. Williams AB, Bartram CI, Modhwadia D et al (2001) Endocoil magnetic resonance imaging quantification of external anal sphincter atrophy. Br J Surg 88(6):853–859 28. Titi MA, Jenkins JT, Urie A, Molloy RG (2008) Correlation between anal manometry and endosonography in females with faecal incontinence. Colorectal Dis 10(2):131–137 29. Zutshi M, Salcedo L, Hammel J, Hull T (2009) Anal physiology testing in fecal incontinence: is it of any value? Int J Colorectal Dis 25(2):277–282 30. Wasserberg N, Mazaheri A, Petrone P, Tulchinsky H, Kaufman HS (2010) 3D endoanal ultrasonography of external anal sphincter defects in patients with faecal incontinence: Correlation with symptoms and manometry. Colorectal Dis 13(4):449–453 31. Hill K, Fanning S, Fennerty MB, Faigel DO (2006) Endoanal ultrasound compared to anorectal manometry for the evaluation of fecal incontinence: a study of the effect these tests have on clinical outcome. Dig Dis Sci 51(2):235–240 32. Mowatt G, Glazener C, Jarrett M (2008) Sacral nerve stimulation for fecal incontinence and constipation in adults: a short version Cochrane review. Neurourol Urodyn 27(3):155–161 33. Madoff RD (2004) Surgical treatment options for fecal incontinence. Gastroenterology 126(1 Suppl 1):S48–S54