What is Bowel Endometriosis?
Bowel endometriosis is a severe, deep infiltrating form of endometriosis (DIE) where tissue similar to the uterine lining grows on the surface of or penetrates into the walls of the intestines. This condition most commonly affects the rectosigmoid colon—the area where the colon meets the rectum—but can also be found on the appendix, small intestine, and cecum
Bowel endometriosis is a highly complex disease that is frequently misdiagnosed for years as more common gastrointestinal conditions like Irritable Bowel Syndrome (IBS), Crohn’s disease, or colitis.
Patients are often directed down a path of dietary changes and GI medications which fail to address the underlying disease, allowing it to progress and cause worsening inflammation, scarring (fibrosis), and in severe cases, partial or full obstruction of the bowel.
The most common symptoms
The symptoms of bowel endometriosis are notoriously debilitating and are often, but not always, cyclical in nature, flaring intensely in the days before and during menstruation.
Cyclical Dyschezia (Painful Bowel Movements)
This is the hallmark symptom of rectosigmoid endometriosis and is far more severe than menstrual-related cramping. Patients describe dyschezia as a sharp, searing, or stabbing pain felt deep within the rectum and pelvis that occurs specifically during a bowel movement. The pain can be so intense that it causes patients to avoid going to the bathroom, leading to constipation and further complications. This pain is caused by the stretching of the bowel wall as stool passes over a rigid, inflamed, and painful endometriotic nodule.
Severe, Painful Bloating (“Endo Belly”)
While many people experience bloating, the bloating associated with bowel endometriosis is profoundly different. Known as “Endo Belly,” it is a severe, painful distension of the abdomen that can happen rapidly, making a person appear several months pregnant. This is not simply gas; it is a significant inflammatory response caused by the endometriotic lesions on the bowel, which can disrupt digestion and cause fluid shifts. This bloating is often accompanied by intense abdominal pain, nausea, and cramping that worsens cyclically.
Cyclical Rectal Bleeding (Hematochezia)
Finding blood after a bowel movement can be alarming. When it occurs specifically during your menstrual period, it is a highly indicative sign of deep endometriosis that has infiltrated through the bowel wall to the inner mucosal lining. As this ectopic tissue responds to hormonal signals, it breaks down and bleeds along with your period, resulting in blood in the stool. This symptom is often incorrectly dismissed as hemorrhoids, delaying an accurate diagnosis and appropriate treatment.
Our Surgical Philosophy and Treatment Approach
Gold-Standard Nerve-Sparing Excision Surgery
At ESSI, we view bowel endometriosis as a surgical disease that requires a definitive surgical solution. The gold-standard treatment is a meticulous, nerve-sparing laparoscopic or robotic excision surgery. Our philosophy is rooted in the complete and total removal of every endometriotic nodule, thereby restoring normal anatomy and function. Depending on the depth and size of the disease, this may involve one of three techniques:
- Shaving: For superficial disease on the bowel surface.
- Discoid Resection: For deeper nodules, where a small disc of the bowel wall is removed and repaired.
- Segmental Resection and Reanastomosis: For large, obstructive nodules, where the diseased section of the bowel is completely removed and the healthy ends are reconnected.
Regardless of the technique required, our paramount priority is the preservation of the delicate autonomic nerves of the pelvis. These nerves, which control bowel, bladder, and sexual function, are intricately entwined around the rectum.
Our surgeons are experts in the complex retroperitoneal dissection required to identify, isolate, and protect these vital structures, ensuring that we not only remove the disease but safeguard your future quality of life.
BOWEL Endometriosis
Frequently Asked Questions
1. My GI doctor says I have IBS, but my symptoms are worse with my period. Could it be bowel endometriosis?
This is an incredibly common scenario and a key reason for diagnostic delay. While IBS and bowel endometriosis share symptoms like bloating, pain, and altered bowel habits, the critical difference is the cyclical nature and severity of the symptoms.
If your “IBS” flares intensely with your period and is accompanied by specific red flags like severe pain with bowel movements (dyschezia) or cyclical rectal bleeding, endometriosis should be strongly suspected.
An endometriosis specialist can order the correct imaging, like a pelvic MRI with endometriosis protocol, and perform the necessary surgical evaluation that a gastroenterologist is not trained to do.
2. What is the best surgical approach for bowel endometriosis: shaving, discoid resection, or a bowel resection?
The “best” surgical approach is the one that is tailored to your specific disease by an expert surgeon. There is no one-size-fits-all answer.
The decision is made intraoperatively based on the location, size, and depth of the endometriotic nodule. A highly skilled surgeon has mastery of all three techniques and will choose the most conservative option that still achieves complete and safe removal of the disease.
The ultimate goal is to remove the endometriosis entirely while preserving as much healthy tissue as possible. This requires the advanced judgment and technical skill that defines a true endometriosis specialist.