Annals of Coloproctology

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Benign proctology,Surgical technique

Minimal Lateral Internal Sphincterotomy (LIS): Is It Enough to Cut Less Than the Conventional Tailored LIS?: Keun-Hee Lee, Keehoon Hyun, Seo-Gue Yoon, Jong-Kyun Lee; Ann Coloproctol. 2021;37(5):275-280. Published online July 9, 2021; DOI: https://doi.org/10.3393/ac.2020.00976.0139

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9 Web of Science
11 Citations

Purpose
Anal fissure is a common anorectal condition, yet its pathogenesis remains unclear. Lateral internal sphincterotomy (LIS) is the gold standard treatment for chronic anal fissures that do not respond to conservative treatment; however, it has a risk of anal incontinence. We believe that fibrosis of the internal anal sphincter is an important factor in the pathogenesis of chronic anal fissure. In this study, we describe the minimal LIS method, a minimally invasive method where only the fibrotic portion of the internal anal sphincter is cut. We also describe the outcomes of this method.
Methods
We performed a retrospective review of 468 patients (270 male and 198 female) who underwent minimal LIS for chronic anal fissure in 2017 at Seoul Song Do Hospital. We analyzed the patients’ clinical characteristics, manometry data, complications, and outcomes of minimal LIS. The outcomes of the surgery were assessed via questionnaires during the postoperative outpatient visits, beginning 2 weeks postoperatively.
Results
The overall complication rate was 4.0% (19 patients). Delayed healing occurred in 14 patients (3.0%), perianal abscess was present in 3 patients (0.6%), and gas incontinence occurred in 2 patients (0.4%). All complications were improved with conservative treatment. Recurrence, defined as the recurrence of anal fissure more than 4 weeks after healing, was present in 6 patients (1.3%).
Conclusion
Minimal LIS is a safe and effective treatment option for patients with chronic anal fissure. Postoperative complications, especially incontinence and recurrence, are rare.

Citations

Citations to this article as recorded by

Operative Therapie der Analfissur
Ricarda Diller
coloproctology.2025; 47(4): 254. CrossRef
Current evidence and new trends in anal fissure treatment
Marta DOMÍNGUEZ-MUÑOZ, Andrea BALLA, Juan Carlos GÓMEZ-ROSADO, Salvador MORALES-CONDE
Minerva Surgery.2025;[Epub] CrossRef
The Practices and Preferences of Turkish Surgeons in the Treatment of Anal Fissure
Ümit Özdemir, Necip Tolga Baran, Ahmet Seki
Journal of Coloproctology.2025; 45(03): 001. CrossRef
Management of Hemorrhoids and Anal Fissures
Oladapo Akinmoladun, William Oh
Surgical Clinics of North America.2024; 104(3): 473. CrossRef
Anal Fissure and Its Treatments: A Historical Review
Cristiana Riboni, Lucio Selvaggi, Francesco Cantarella, Mauro Podda, Salvatore Bracchitta, Vinicio Mosca, Angelo Cosenza, Vincenzo Cosenza, Francesco Selvaggi, Bruno Nardo, Francesco Pata
Journal of Clinical Medicine.2024; 13(13): 3930. CrossRef
Botulinum toxin injection versus lateral internal sphincterotomy for chronic anal fissure: a meta-analysis of randomized control trials
Ali Bonyad, Reza Hossein Zadeh, Setareh Asgari, Fatemeh Eghbal, Pardis Hajhosseini, Hani Ghadri, Niloofar Deravi, Reza Shah Hosseini, Mahdyieh Naziri, Rasoul Hossein Zadeh, Yaser khakpour, Sina Seyedipour
Langenbeck's Archives of Surgery.2024;[Epub] CrossRef
Modern trends and priority in treatment of chronic anal fissure
S. A. Aliev, E. S. Aliev
Grekov's Bulletin of Surgery.2024; 183(4): 77. CrossRef
New Findings at the Internal Anal Sphincter on Cadaveric Dissection and Review of Sphincter-Related Surgery in a Newer Prospective
Aswini Kumar Pujahari
Indian Journal of Surgery.2023; 85(3): 585. CrossRef
Long-term Efficacy and Safety of Controlled Manual Anal Dilatation in the Treatment of Chronic Anal Fissures: A Single-center Observational Study
Tatsuya Abe, Masao Kunimoto, Yoshikazu Hachiro, Shigenori Ota, Kei Ohara, Mitsuhiro Inagaki, Yusuke Saitoh, Masanori Murakami
Journal of the Anus, Rectum and Colon.2023; 7(4): 250. CrossRef
The Association of Coloproctology of Great Britain and Ireland guideline on the management of anal fissure
Katie L. R. Cross, Steven R. Brown, Jos Kleijnen, James Bunce, Melanie Paul, Sophie Pilkington, Oliver Warren, Oliver Jones, Jon Lund, Henry J. Goss, Michael Stanton, Tatenda Marunda, Artaza Gilani, L. Wee Sing Ngu, Philip Tozer
Colorectal Disease.2023; 25(12): 2423. CrossRef
Is It a Refractory Disease?- Fecal Incontinence; beyond Medication
Chungyeop Lee, Jong Lyul Lee
The Ewha Medical Journal.2022;[Epub] CrossRef

Clinical Outcomes of Lateral Internal Sphincterotomy for Patients with Chronic Anal Fissure.: Park, Jung Soo , Lee, Jae Bum , Kim, Tae Sun , Cho, Hang Jun , Kim, Do Sun , Lee, Doo Han; J Korean Soc Coloproctol. 2007;23(5):292-296.; DOI: https://doi.org/10.3393/jksc.2007.23.5.292

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Abstract PDF: PURPOSE
A lateral internal sphincterotomy (LIS) is a safe and effective surgical treatment that is the most commonly used one for patients with chronic anal fissure. However, reports on the recurrence rate and complications after LIS published in Korea are rare. The purpose of our study is to identify the types and rates of recurrence, the complications after LIS, and the differences in clinical outcomes between open and closed LIS.
RESULTS
We used hospital records and telephone interviews to study retrospectively the rates of recurrence and complications of 898 patients who underwent a LIS for chronic anal fissure from July, 2003, to June 30, 2004.
RESULTS
There were 292 male (mean age: 36.8 years, range: 16~84) and 606 female (mean age: 32.4 years, range: 1~68) patients. The preoperative mean maximum resting pressure in anal manommetry was 99.2 cmH2O in male patients and 97.7 cmH2O in female patients. Recurrence of fissure after LIS was present in five cases (0.6%). All underwent a LIS, on the same side of a previous LIS in four cases and on the opposite side in one case. Delayed healing of the fissure was present in six cases (0.7%). All of these patients were improved by conservative management. Complications of the LIS were thrombus formation, perianal abscess, fistula, and incontinence. Thrombus formation was present in eight cases (0.9%). Five patients underwent a thrombectomy and three patients were cured by conservative management. Perianal abscess or fistula was present in three patients (0.3%), who underwent incision and drainage or a simple fistulotomy. Incontinence was present in two cases (0.2%). One patient was lost to follow up, and the other patient was improved by conservative management.
CONCLUSIONS
LIS is a safe and effective treatment for patients with chronic anal fissure, and recurrence and complications of LIS are rare.

Prevalence of Anatomic Anal Stenosis in Patients with Chronic Anal Fissure and Results of Lateral Internal Sphincterotomy.: Cho, Dong Yoon , Kim, Dong Yi , Kim, Young Jin; J Korean Soc Coloproctol. 2002;18(1):7-9.

1,644 View
35 Download

Abstract PDF: PURPOSE
The aim of this study was to estimate the prevalence of anatomic anal stenosis in patients with chronic anal fissure (CAF) and ascertain the results of lateral internal sphincterotomy (LIS) using a new calibrator.
METHODS
Ninety-eight adults with CAF and a control group of 40 normal adults underwent anal calibration under spinal anesthesia. The calibrator was a conical design and the diameter was scaled in increments of 1 mm. The calibration was standardized and the reliability of it was assessed by two independent examiners for the same group (n=45). Confounding effects of age, sex, body weight, and height on the anal caliber were studied. The internal sphincter was divided to the level of the dentate line during LIS.
RESULTS
The anal caliber was 34.6 +/- 1.4 mm (mean +/- SD) in the control group and 28.7 +/- 3.0 mm (mean +/- SD) in patients with CAF. Excellent correlation was obtained between the two examiners (r=0.958). The confounding effects of age, sex, body weight, and height were not significant. Therefore, anal stenosis was defined as when the measurement was 31 mm or below (mean-2SD of control value). Stenosis was present in 82 of 98 patients (84%) with CAF. Patients with stenosis had an anal caliber of 27.9 +/- 2.5 mm, with a range of 21 to 31 mm. Following LIS, 91 of 98 patients (93%) with CAF attained the normal range, two patients still had stenosis, and five patients had an anal caliber exceeding the normal value.
CONCLUSIONS
Anatomic anal stenosis was found in 84% of the patients with CAF. Ninety three percent of these patients attained a normal anal caliber, 2 percent of the patients still had stenosis and 5 percent of the patients had an anal caliber exceeding the normal value after LIS.

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