Sangwan Y P, Rosen L, Riether R D, Stasik J J, Sheets J A, Khubchandani I T
Division of Colon & Rectal Surgery, Lehigh Valley Hospital, Allentown, Pennsylvania.
Dis Colon Rectum. 1994 Sep;37(9):885-9. doi: 10.1007/BF02052593.
A study of 523 fistulas of cryptoglandular origin operated on between January 1985 and December 1991 at the Lehigh Valley Hospital was undertaken for the purpose of establishing whether the "so-called" simple fistula-in-ano has a favorable outcome. High transsphincteric fistulas with or without high blind tract, suprasphincteric, extrasphincteric, and horseshoe fistulas as well as fistulas associated with inflammatory bowel disease were excluded.
Four-hundred sixty-one patients with anal fistulas classified as simple fistulas-in-ano (uncomplicated transsphincteric, low and high blind track intersphincteric) were studied retrospectively. There were 310 males and 151 females with an average age of 42 years and mean follow-up of 34 months.
Thirty (6.5 percent) patients developed recurrent fistulas: 16 (53.3 percent) because of missed internal openings at initial surgery, six (20 percent) attributed to missed secondary tracks, five (16.7 percent) because of premature fistulotomy wound closure, and three (10 percent) because of miscellaneous factors.
All so-called simple fistulas-in-ano may not have readily detectable primary openings and may possess secondary tracks which preclude their behavior as simple fistulas.
对1985年1月至1991年12月在利哈伊谷医院接受手术的523例腺源性肛瘘进行研究，以确定所谓的单纯肛管肛瘘是否有良好的预后。排除伴有或不伴有高位盲管的高位经括约肌肛瘘、括约肌上肛瘘、括约肌外肛瘘、马蹄形肛瘘以及与炎症性肠病相关的肛瘘。
对461例被归类为单纯肛管肛瘘（无并发症的经括约肌肛瘘、低位和高位盲管型括约肌间肛瘘）的患者进行回顾性研究。其中男性310例，女性151例，平均年龄42岁，平均随访34个月。
30例（6.5%）患者出现肛瘘复发：16例（53.3%）是由于初次手术时遗漏内口，6例（20%）归因于遗漏继发瘘道，5例（16.7%）是由于肛瘘切开术伤口过早闭合，3例（10%）是由于其他因素。
所有所谓的单纯肛管肛瘘可能没有易于发现的原发开口，并且可能存在继发瘘道，这使得它们并非表现为单纯肛瘘。
