Benign proctology,Surgical technique
- Minimal Lateral Internal Sphincterotomy (LIS): Is It Enough to Cut Less Than the Conventional Tailored LIS?
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Keun-Hee Lee, Keehoon Hyun, Seo-Gue Yoon, Jong-Kyun Lee
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Ann Coloproctol. 2021;37(5):275-280. Published online July 9, 2021
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DOI: https://doi.org/10.3393/ac.2020.00976.0139
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23,787
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9
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Abstract
PDF
- 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.
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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
Benign proctology,Functional outcome
- The Long-term Effect of Standardized Anal Dilatation for Chronic Anal Fissure on Anal Continence
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Ilia Pinsk, David Czeiger, Daria Lichtman, Avraham Reshef
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Ann Coloproctol. 2021;37(2):115-119. Published online March 16, 2020
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DOI: https://doi.org/10.3393/ac.2020.03.16
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11,531
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217
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8
Web of Science
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10
Citations
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Abstract
PDF
- Purpose
For the past several decades, internal anal sphincterotomy has generally been considered to be the standard operation for an anal fissure. However, wound complications inherent in this operation forced surgeons to look for an alternative form of treatment. The aim of our study was to evaluate the long-term outcome of anal dilatation for chronic anal fissure, especially possible negative impact on anal sphincter function.
Methods
The study was approved by the local Institutional Review Board and given a waiver of written consent. A phone call survey was undertaken among a group of consecutive patients who had an anal dilatation by standardized technique for chronic anal fissure for the period between 2000 and 2016. The survey included medical, obstetrical and surgical-related data, Wexner fecal incontinence score, recurrence of the anal fissure, and the need for additional medical intervention. Five hundred 48 patients were identified after limitations of age, concomitant pathology, and procedures that were applied to the hospital computerized database. Eighty-five patients (group A) agreed to participate in the survey and 463 patients did not.
Results
There were no differences between groups in demographic information and medical records data; therefore, group A may well represent a satisfactory sample of the whole group. The interval between the procedure and the survey was 6.8 ± 2.7 years. The Wexner incontinence score was 0 in 94% of patients.
Conclusion
Anal dilatation, performed in a systematic and standardized way, has a successful outcome with no complications and has no clear long-term negative impact on anal sphincter function.
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Citations
Citations to this article as recorded by

- Early Outcomes of Hirschsprung's Disease after Definitive Surgery: A Ten-year Experience
Muntadhar Muhammad Isa, Maimun Syukri, Muchlisin Zainal Abidin, Dian Adi Syahputra, Teuku Yusriadi, Yumna Muzakkir, Siti Magfirah, Gunadi Gunadi
Current Pediatric Reviews.2025; 21(4): 384. CrossRef - Сontrolled circular dilatation and lateral subcutaneous sphincterotomy for chronic anal fissures associated with hemorrhoids III-IV
Z. Z. Kamaeva, A. Yu. Titov, R. Yu. Khryukin, I. S. Anosov, Yu. A. Shelygin
Koloproktologia.2024; 23(1): 42. 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 - A systematic review of translation and experimental studies on internal anal sphincter for fecal incontinence
Minsung Kim, Bo-Young Oh, Ji-Seon Lee, Dogeon Yoon, Wook Chun, Il Tae Son
Annals of Coloproctology.2022; 38(3): 183. CrossRef - The role of dilatation methods and lateral subcutaneous sphincterotomy in the internal anal sphincter spasm treatment (systematic literature review and meta-analysis)
Z. Z. Kamaeva, A. Yu. Titov, A. A. Ponomarenko, R. Yu. Khrukin, I. S. Anosov, Yu. A. Shelygin
Hirurg (Surgeon).2022; (4): 19. CrossRef - Is It a Refractory Disease?- Fecal Incontinence; beyond
Medication
Chungyeop Lee, Jong Lyul Lee
The Ewha Medical Journal.2022;[Epub] CrossRef - The role of percutaneous tibial nerve stimulation (PTNS) in the treatment of chronic anal fissure: a systematic review
Konstantinos Perivoliotis, Ioannis Baloyiannis, Dimitrios Ragias, Nikolaos Beis, Despoina Papageorgouli, Emmanouil Xydias, Konstantinos Tepetes
International Journal of Colorectal Disease.2021; 36(11): 2337. CrossRef - Anorectal emergencies: WSES-AAST guidelines
Antonio Tarasconi, Gennaro Perrone, Justin Davies, Raul Coimbra, Ernest Moore, Francesco Azzaroli, Hariscine Abongwa, Belinda De Simone, Gaetano Gallo, Giorgio Rossi, Fikri Abu-Zidan, Vanni Agnoletti, Gianluigi de’Angelis, Nicola de’Angelis, Luca Ansaloni
World Journal of Emergency Surgery.2021;[Epub] CrossRef - Safety and efficacy of the treatment of chronic anal fissure by lateral internal sphincterotomy: A retrospective cohort study
Fatma Al-thoubaity
Annals of Medicine and Surgery.2020; 57: 291. CrossRef