Dog & Cat HospitalCalabasas

Patient Education

Rectal Pull-Through

Rectal pull-through allows the surgeon to remove rectal polyps and masses that cause chronic straining or bleeding — without a large abdominal incision.

Rectal pull-through, also called rectal eversion or pull-through resection, is a surgical technique that brings rectal tissue outward through the anal opening so that abnormal growths — most commonly benign or low-grade malignant polyps — can be excised under direct visualization and the healthy bowel wall sutured back in place. Because the approach is transanal (through the anus) rather than through the abdomen, recovery is generally faster and less involved than open abdominal surgery for similarly located lesions. Dr. Alan Schulman performs rectal pull-through procedures at Dog & Cat Hospital Calabasas for dogs and cats experiencing straining, blood in the stool, or visible rectal masses.

Why It's Recommended

The rectum is located in a confined anatomic space that is difficult to reach through a standard abdominal incision. Rectal pull-through provides excellent exposure of the rectal mucosa (inner lining) without requiring a large incision, making it the preferred approach for polyps and small masses confined to the rectal wall. Polyps that cause straining (tenesmus), mucus in the stool, or hematochezia (fresh blood) should be removed both to relieve symptoms and to obtain a histopathology report — benign polyps are cured by excision, while higher-grade tumors require additional planning. Your surgeon selects this approach based on the size, location, and nature of the lesion on pre-operative imaging.

How the Procedure Works

The procedure is performed under general anesthesia with the patient positioned appropriately to provide perineal access. The steps include:

  • Stay sutures are placed at the anal margin to evert (pull outward) the rectal wall, bringing the polyp or mass into view
  • The lesion is excised with a margin of normal tissue; electrocautery controls bleeding
  • The mucosal edges are sutured with fine absorbable sutures to reconstruct the rectal wall
  • The stay sutures are removed and the rectum returns to its normal position

The excised tissue is submitted to a veterinary pathologist. In straightforward cases the entire procedure takes under an hour, though more complex or larger lesions may require additional time.

Has your pet been straining or passing blood in the stool?

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Preparation

Before surgery the team performs digital rectal examination and typically colonoscopy or proctoscopy to characterize the lesion and confirm it is amenable to a transanal approach. Abdominal ultrasound screens for enlarged regional lymph nodes or distant spread, which would alter the surgical plan. Standard pre-anesthetic bloodwork is required. A bowel prep — withholding food for twelve to twenty-four hours and administering an enema the evening before — reduces contamination during surgery. Owners should follow any pre-operative fasting instructions precisely.

Recovery & Aftercare

Most patients are discharged the same day or after one overnight stay. Recovery at home progresses as follows:

  • Days 1–5: soft, low-residue diet to reduce straining on suture lines; pain medication; e-collar
  • Days 3–10: mild tenesmus and small amounts of blood-tinged mucus at defecation are common and expected during mucosal healing
  • Week 2–3: suture recheck; return to normal diet when healing is confirmed

Stool softeners are often prescribed for one to two weeks to prevent hard stools from stressing the repair. Histopathology results are typically available within five to seven business days and guide any further treatment recommendations.

Risks & What to Expect

Rectal pull-through is associated with a lower complication rate than open abdominal rectal surgery. Possible complications include dehiscence (breakdown) of the rectal suture line, infection, fecal incontinence (especially with large or circumferential lesions), or rectal stricture. Fecal incontinence is uncommon after polyp removal but is a recognized risk when significant circumferential tissue must be removed. Lesion recurrence is possible with incompletely excised or malignant polyps; pathology results guide the follow-up plan. All risks are discussed before surgery.

Frequently Asked Questions

1How long does recovery take after rectal pull-through surgery in a dog?
Most dogs and cats are comfortable at home within a few days and return to normal activity within two to three weeks. Mild straining and small amounts of blood-tinged mucus at defecation during the first week are expected as the rectum heals.
2Will my dog have blood in the stool after rectal surgery?
A small amount of blood-tinged discharge is normal for the first five to seven days as the mucosal suture line heals. Significant or increasing bleeding, or blood accompanied by straining that doesn't improve, warrants a call to the clinic.
3Is a rectal polyp in a dog always cancerous?
Most rectal polyps in dogs are benign adenomatous polyps that are cured by complete excision. A small proportion are adenocarcinomas or other malignant tumors, which is exactly why histopathology submission after removal is essential.
4Can rectal polyps in dogs and cats come back after surgery?
Benign polyps that are completely excised rarely recur. Incompletely excised lesions or malignant tumors have a higher recurrence risk; pathology results guide whether additional treatment, such as radiation or chemotherapy consultation, is warranted.
5Will my dog be incontinent after rectal surgery?
Fecal incontinence is an uncommon outcome when a discrete polyp is removed with preservation of the anal sphincter. The risk increases when a larger or circumferential segment of rectal wall must be removed; the surgeon reviews this risk specifically before operating.
6How much does rectal pull-through surgery cost for a dog?
Cost depends on the size and complexity of the lesion, anesthesia time, and whether pre-operative endoscopy is included. A written estimate covering the surgery, monitoring, and pathology submission is provided at the consultation.
7What are the signs that my cat or dog has a rectal polyp?
Common signs include straining to defecate, mucus or fresh blood in the stool, ribbon-like stools, and occasionally a visible pink mass protruding from the anus when the pet strains. These signs overlap with other rectal diseases, so examination is always needed to distinguish them.
8Does my dog need to fast before rectal surgery?
Yes — typically twelve to twenty-four hours of food withholding plus an enema the evening before surgery to minimize fecal contamination of the surgical field. Specific instructions will be provided at the pre-operative visit.

Has your pet been straining or passing blood in the stool?

A rectal examination and targeted imaging can determine whether a polyp or mass is the cause and whether a pull-through procedure is the right solution. Our surgical team is ready to help.

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