Ostomy stenosis occurs when a surgically created stoma becomes too narrow for waste to pass normally. It may cause decreased output, narrow stool, abdominal cramping, swelling, appliance problems, or symptoms of a bowel obstruction.
At the Center for Colorectal Disease of Arizona, we evaluate ostomy complications and determine whether narrowing can be managed conservatively or requires surgical correction.
What Is Ostomy Stenosis?
An ostomy is an opening created through the abdominal wall to allow stool to leave the body. Depending on the underlying condition and surgery performed, the opening may connect to the colon as a colostomy or to the small intestine as an ileostomy.
Stenosis develops when scar tissue or another structural change makes the opening smaller than intended. The narrowing may occur at the skin level, within the abdominal wall, or farther along the segment of intestine forming the stoma.
Ostomy stenosis can develop gradually, so early changes may be subtle. Patients may initially notice that output looks different or takes longer to pass before more disruptive symptoms appear.
What Signs Suggest That a Stoma Has Become Too Narrow?
The symptoms of ostomy stenosis vary according to the location and severity of the narrowing. Common warning signs include:
- Stool that is consistently thinner than usual
- Reduced or delayed ostomy output
- Difficulty passing firm stool
- Abdominal cramping or pressure
- Increased gas without normal stool output
- Swelling around the stoma
- Frequent leakage beneath the appliance
- A visible decrease in the stoma opening
- Repeated partial blockages
Some patients also notice that the stoma functions better when stool is loose but has difficulty passing thicker output. This pattern may suggest that the opening no longer has enough space to allow normal passage.
These symptoms should be evaluated because reduced output can also result from dehydration, dietary factors, constipation, an intestinal blockage, or another ostomy complication. Visual appearance alone may not determine the cause.
What Causes an Ostomy Opening to Narrow?
Stenosis can occur soon after surgery or develop months or years later. Scar tissue is a common factor, but several changes may contribute to narrowing.
Reduced blood flow during or after surgery can damage tissue and lead to scarring as the area heals. The stoma may also retract below the skin surface, creating tension that contributes to narrowing. Inflammation related to Crohn’s disease can affect the segment of intestine used to create the ostomy.
Other possible causes include repeated irritation, infection, tissue separation during healing, or an opening through the abdominal wall that is too restrictive. A colon rectal doctor will consider the timing of symptoms and the patient’s surgical history when identifying the likely cause.
When Can Ostomy Stenosis Become Urgent?
Mild narrowing may allow some output to pass, but severe stenosis can contribute to a complete intestinal obstruction. A patient should seek urgent medical attention for:
- No ostomy output combined with worsening pain
- Persistent vomiting
- Significant abdominal swelling
- Severe or increasing cramps
- Inability to keep liquids down
- Sudden changes in the stoma’s color
- Heavy bleeding
A lack of output by itself does not always indicate an emergency, especially when a patient has eaten less than usual. However, absent output combined with pain, vomiting, or progressive swelling requires prompt assessment.
Patients should not insert objects into the stoma or attempt forceful dilation without medical direction. These actions may injure the tissue or create a perforation.
How Does a Colorectal Surgeon Diagnose Ostomy Stenosis?
Evaluation usually begins with a review of symptoms, output patterns, medications, diet, hydration, and previous operations. The colorectal surgeon or colon specialist will examine the stoma and surrounding skin to determine whether the narrowing is visible at the surface.
A gentle examination may help determine the opening’s diameter and the depth of the narrowed area. If the stenosis extends below the skin, additional testing may be necessary. A contrast study, endoscopic examination, or imaging test can help identify the location and length of the narrowing while checking for another source of obstruction.
This assessment is important because treatment depends on whether the narrowing is mild, short, severe, inflammatory, or associated with another complication.
How Is Ostomy Stenosis Treated?
Treatment is based on symptom severity and the amount of stool that can pass. Mild stenosis may sometimes be managed with dietary adjustments, adequate hydration, stool consistency management, and changes to the ostomy appliance. These measures should be personalized to the type of ostomy and the patient’s medical needs.
A physician may recommend careful, gradual dilation in selected cases. Because dilation can cause bleeding, tissue damage, and additional scarring, it should only be performed according to clinical instructions.
Persistent or severe narrowing may require surgery. The colorectal surgeon may revise the stoma at the skin level when the stenosis is short and superficial. Deeper narrowing may require releasing scar tissue, recreating the opening, or relocating the stoma. The appropriate approach depends on the original operation, the condition of the bowel, and the patient’s overall health.
Why Is Evaluation by a Colon Specialist Important?
An ostomy problem may involve the skin, intestinal tissue, abdominal wall, or prior surgical site. A colorectal surgeon is trained to evaluate both functional and structural causes and provide nonsurgical or surgical care when appropriate.
The American Society of Colon and Rectal Surgeons reports that colorectal polyps affect approximately 20% to 30% of American adults. Colorectal surgeons treat a broad range of benign and malignant conditions, including diseases that may eventually require temporary or permanent ostomy surgery.
The term proctologist is still commonly used, but colon and rectal surgeon or colorectal surgeon more accurately reflects the full scope of modern training. A GI clinic may evaluate digestive symptoms and perform endoscopic procedures, while a colorectal surgeon also manages complex anorectal conditions, ostomies, and operations involving the colon and rectum.
At the Center for Colorectal Disease of Arizona, we provide colorectal care for ostomy concerns and other conditions affecting the colon, rectum, and anus. Our team can evaluate changes in output, examine the stoma, and explain appropriate treatment options.
Contact us to request an appointment with a colon specialist at one of our Phoenix-area locations.