What Is Rectal Prolapse?
Rectal prolapse occurs when the upper portion of the rectum telescopes itself inside out and comes out through the rectal opening. It is seen most often in elderly women, but it can occur in men and women of any age.
What Causes Rectal Prolapse?
Rectal prolapse is associated with chronic straining to pass stool. It is known that the attachments of the rectum to the pelvic bones progressively weaken. When these attachments are weak, straining to pass stool causes the rectum to turn itself inside out. In many cases, the cause is unknown.
What Symptoms Occur With Rectal Prolapse?
The primary symptom is the feeling of tissue coming out of the rectum. Bleeding and mucous drainage frequently accompany rectal prolapse. When the problem first starts, the rectum may turn itself inside out but not come out the rectal opening. During this phase a common symptom is the frequent urge to have a bowel movement when there is no need to pass stool. As the prolapse progresses, the rectum comes out with bowel movements and returns inside by itself. Later the prolapse may occur with any activity and finally just standing up may cause it. It may become necessary to push the rectum back inside. Constipation commonly occurs with rectal prolapse. The chronic straining associated with constipation may be a predisposing factor, or constipation may occur because the prolapse partially blocks the rectal opening. Continued straining and the prolapse itself may damage the sphincter muscle that controls the passage of stool. If that occurs, accidental bowel leakage, or ABL results. It can be difficult at times to differentiate true accidental bowel leakage from mucous discharge directly from the prolapsed tissue.
How Does Rectal Prolapse Differ From Hemorrhoids?
Hemorrhoids are a cluster of anal cushions (spongy tissue with a lot of blood vessels). A ring of hemorrhoids lies under the skin just outside the rectal opening. A second ring lies under the lining of the rectum just inside the rectal opening. If an inside hemorrhoid enlarges, it may come out the rectal opening with a bowel movement or during exercise. However, only the lining and the blood vessels come out, unlike rectal prolapse where all layers of the rectal wall come out. An examination is necessary to determine the diagnosis.
How Is Rectal Prolapse Diagnosed?
Your doctor can usually diagnose rectal prolapse by taking a careful history and performing a complete anorectal examination. To demonstrate the prolapse, the patient may be asked to strain as if having a bowel movement or to sit on the commode and strain prior to examination. If the prolapse is internal or the diagnosis uncertain, a video defecogram (x-ray pictures taken while the patient is passing contrast instilled in the rectum) can help the doctor determine whether surgery would be helpful and what procedure would be best. Anorectal manometry, a test that measures whether or not the muscles around the rectum are functioning normally, may also be used.
How Is Rectal Prolapse Treated?
Rectal prolapse can be corrected. Options are available for treatment, regardless of age and condition of the patient.Treatment depends on the age of the patient and the severity of the condition. In adults, a high-fiber diet to prevent constipation and straining is recommended if the symptoms are mild. Surgical correction is required in adults if the prolapse does not resolve by itself. Rectal prolapse can successfully be repaired through either an abdominal or rectal procedure. Your doctor will discuss which procedure is most appropriate for you. If incontinence accompanies the prolapse, the incontinence improves over half the time after the prolapse is corrected. If continence does not improve, other treatment is available. Rectal prolapse in children frequently corrects itself. The doctor will instruct parents how to reduce the prolapse when it occurs and how to prevent constipation in their child.
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