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The rectum telescopes into itself — and sometimes toward the uterus.

Rectal intussusception / internal rectal prolapse

The rectal wall folds and slides into the lumen below it, like a sleeve pulled into itself. When the leading edge aims anteriorly, that telescope can press through a deep cul-de-sac toward the vagina, uterus, and cervix. External prolapse is the version you can see. Internal is the version people are told is in their head.

What it is

  • Internal rectal prolapse (intussusception) can be intra-rectal or intra-anal. It is a structural finding on defecography, not a personality trait.
  • In a pelvis with a deep pouch of Douglas and a yielding rectovaginal septum, the telescoping rectum can become an anterior battering ram. That is the mechanical story behind “it telescopes into my uterus and my cervix drops.” It is under-described in clinic and very real on imaging.
  • It often travels with rectocele, enterocele or sigmoidocele, perineal descent, and a dyssynergic pelvic floor. Fixing one line on a report rarely fixes the emptying.
  • NICE and colorectal societies typically start with conservative care for internal prolapse: bowel regimen, defecatory retraining / biofeedback. Surgery (ventral rectopexy, Delorme, and related repairs) is for refractory, bothersome disease — chosen with someone who does a lot of them.

What it can feel like

  • Incomplete emptying, the “I just went and I need to go again” loop
  • Tenesmus, mucus, or a plugging sensation
  • Pressure low in the pelvis or a bulge that comes and goes with straining
  • Splinting, digital assistance, or unusual postures to evacuate
  • A cervix that feels lower after a bowel movement or a long day on your feet

What you were probably told

  • If it doesn’t come out of the anus, it isn’t a prolapse.
  • That’s hemorrhoids. Use cream.
  • You have IBS. Take fiber and a mood medication.
  • Your colonoscopy was normal, so the bowel is fine.

How it actually gets named

  • Symptom pattern of obstructed defecation, incontinence, or mixed, plus exam.
  • Defecating proctogram or MR defecography is the money test. Ask for a report that names intussusception grade, enterocele/sigmoidocele, rectocele, and perineal descent.
  • Anorectal manometry and balloon expulsion help sort dyssynergia from pure structure — many people have both.
  • Do not accept “normal colonoscopy” as a pelvic-floor workup.

What tends to help

  • A bowel program you can live with: osmotic laxative, fiber that does not bloat you, toilet stool, no straining contests.
  • Pelvic floor PT / biofeedback for dyssynergia. If the muscle will not relax, surgery on the telescope may still leave you emptying badly.
  • Treat the sigmoidocele and apical support in the same conversation. The telescope and the dropped colon are housemates.
  • Surgical options for internal prolapse, when indicated, often center on ventral mesh rectopexy. Mesh conversations should be specific, not internet folklore and not sales pitches.
  • If the cervix is descending under this pressure, urogynecology belongs in the room before anyone operates on a single organ.

Take these into the room

  • Was intussusception actually seen on defecography, and did it reach toward the vagina or stay intra-rectal?
  • Is my emptying problem structure, muscle dyssynergia, or both?
  • If this is pressing on my uterus and cervix, who is jointly planning the repair?
  • What is the conservative trial you want, and what would make you recommend surgery?