Dr. Daniel Gay social preview thumbnailDr. Daniel Gay, DO, FACOS
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Dr. Daniel Gay, DO, FACOS
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General surgery in Boise

Lateral Internal Sphincterotomy

Surgical treatment for selected chronic anal fissures.

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Understanding Lateral Internal Sphincterotomy

The appropriate approach depends on diagnosis, anatomy, symptoms, health, prior procedures, and personal goals. Evaluation may include examination, imaging, pathology, or coordination with other specialists.

Seek urgent care for severe pain, heavy bleeding, breathing difficulty, rapidly spreading infection, or another emergency.

Comprehensive patient guide

Lateral Internal Sphincterotomy: anatomy, treatment, and risks

This guide supports an informed conversation with a surgeon. Recommendations must be individualized after examination and review of relevant records.

Related anatomy

The internal anal sphincter maintains resting tone. A fissure is a tear in the anal lining, commonly in the posterior midline.

Pathophysiology

Pain and sphincter spasm reduce blood flow and can prevent a chronic fissure from healing.

Diagnosis and evaluation

Diagnosis is commonly based on symptoms and gentle examination; atypical fissures need evaluation for other disease.

Medical and nonsurgical treatment

Medical treatment depends on the diagnosis and may include hydration, fiber adjustment, stool-softening strategies, topical medication, antibiotics for selected infections, pain control, bowel-rest strategies, or management of inflammatory disease. Medication decisions should be individualized.

Surgical and procedural treatment

When fiber, stool regulation, and topical therapy fail, a carefully measured internal sphincter division can reduce spasm and promote healing.

Risks and tradeoffs

Potential risks include bleeding, infection, injury to nearby bowel or organs, urinary retention, pain, scar tissue, bowel-function change, recurrence, need for drainage or additional surgery, anesthesia complications, and for anorectal procedures, uncommon continence problems.

Recovery and shared decisions

Recovery depends on the exact procedure, disease severity, health, work demands, and whether additional treatment is needed. Before treatment, discuss expected pain control, wound care, activity, diet, pathology results, follow-up, and the symptoms that should prompt a call.

  • Ask what alternatives are reasonable.
  • Ask how success and recurrence are measured.
  • Review medications and health optimization.
  • Clarify expected restrictions and follow-up.

Urgent care: Call 911 or seek prompt evaluation for severe or rapidly worsening pain, heavy bleeding, trouble breathing, repeated vomiting, fainting, rapidly spreading redness, or another emergency.

Educational resources

NIDDK Digestive DiseasesCleveland Clinic: Lateral Internal SphincterotomyContact Dr. Gay’s Office

Prepare for your visit

Bring relevant imaging, pathology, laboratory results, medication lists, prior operative reports, and your questions when available.

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Frequently searched questions

More Questions About Lateral Internal Sphincterotomy

What is Lateral Internal Sphincterotomy?

Lateral Internal Sphincterotomy refers to the condition, evaluation, or procedure described on this page. A consultation helps clarify the diagnosis and which options fit an individual patient's health and goals.

What symptoms or concerns are associated with Lateral Internal Sphincterotomy?

Symptoms and concerns vary by patient and by the underlying condition. New, persistent, worsening, or activity-limiting symptoms should be evaluated by a qualified clinician.

When should I see a surgeon about Lateral Internal Sphincterotomy?

Consider a surgical consultation when symptoms persist, a diagnosis has been made, nonsurgical care has not helped, or you want to understand whether a procedure may be appropriate.

How is Lateral Internal Sphincterotomy evaluated?

Evaluation usually includes a medical history and physical examination. Imaging, laboratory testing, endoscopy, pathology, or other studies may be recommended depending on the concern.

What treatment options are available for Lateral Internal Sphincterotomy?

Options may include observation, symptom management, office-based treatment, minimally invasive surgery, or open surgery. The safest choice depends on the diagnosis, severity, and overall health.

Does Lateral Internal Sphincterotomy always require surgery?

Not always. The need for surgery depends on symptoms, risks, test results, expected benefits, and patient preferences. A surgeon can explain reasonable alternatives.

How should I prepare for a consultation about Lateral Internal Sphincterotomy?

Bring a medication list, relevant imaging and reports, prior operative records, and a summary of symptoms. Write down questions and tell the office about blood thinners, allergies, and prior anesthesia concerns.

What is recovery like after treatment for Lateral Internal Sphincterotomy?

Recovery varies with the treatment performed and the patient's health, work, and activity demands. Instructions commonly address pain control, wound care, diet, movement, lifting, and follow-up.

What are the possible risks of treatment for Lateral Internal Sphincterotomy?

Potential risks vary by treatment and can include bleeding, infection, pain, injury to nearby structures, anesthesia complications, delayed healing, or recurrence. Individual risks should be reviewed before treatment.

When is Lateral Internal Sphincterotomy an emergency?

Seek urgent medical care for severe or rapidly worsening pain, persistent vomiting, heavy bleeding, fainting, fever with worsening symptoms, inability to pass stool or gas, or another sudden concerning change.