Rectal prolapse

internal rectal intussusceptionAnal prolapserectopexysolitary rectal ulcer syndromerectal intussusceptionStapled trans-anal rectal resectionanal prolapsuscolitis cystica profundaexternal rectal prolapseInternal intussusception
Rectal prolapse is when the rectal walls have prolapsed to a degree where they protrude out the anus and are visible outside the body.wikipedia
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Obstructed defecation

obstructed defecation syndrome
Rectal prolapse may occur without any symptoms, but depending upon the nature of the prolapse there may be mucous discharge (mucus coming from the anus), rectal bleeding, degrees of fecal incontinence and obstructed defecation symptoms.
Fecal incontinence to gas, liquid, solid stool, or mucus in the presence of obstructed defecation symptoms may indicate occult rectal prolapse (i.e. rectal intussusception), internal/external anal sphincter dysfunction, or descending perineum syndrome.

Rectal discharge

dischargemucous discharge
Rectal prolapse may occur without any symptoms, but depending upon the nature of the prolapse there may be mucous discharge (mucus coming from the anus), rectal bleeding, degrees of fecal incontinence and obstructed defecation symptoms.

Anismus

anal sphincter dyssynergiadyssynergic defecation
It may be used to assess for pelvic floor dyssenergia, (anismus is a contraindication for certain surgeries, e.g. STARR), and these patients may benefit from post-operative biofeedback therapy.
Anismus may also occur with anorectal malformation, rectocele, rectal prolapse and rectal ulcer.

Defecography

defecating proctogram Defecating proctographydefecating proctography
The height of intussusception from the anal canal is usually estimated by defecography.
The procedure gained popularity at this time in the midst of an outbreak of whipworm, which is known to cause rectal prolapse.

Fecal incontinence

incontinenceFecal leakagefaecal incontinence
Rectal prolapse may occur without any symptoms, but depending upon the nature of the prolapse there may be mucous discharge (mucus coming from the anus), rectal bleeding, degrees of fecal incontinence and obstructed defecation symptoms.
The various types of pelvic organ prolapse (e.g. external rectal prolapse, mucosal prolapse and internal rectal intussusception & solitary rectal ulcer syndrome) may also cause coexisting obstructed defecation.

Rectocele

large bowel prolapserectocolesrectum
Symptoms of internal intussusception overlap with those of rectocele, indeed the 2 conditions can occur together.
Severe cases may cause vaginal bleeding, intermittent fecal incontinence, or even the prolapse of the bulge through the mouth of the vagina, or rectal prolapse through the anus.

Constipation

constipatedobstipationchronic constipation
Colonic transit studies may be used to rule out colonic inertia if there is a history of severe constipation.
Complications that can arise from constipation include hemorrhoids, anal fissures, rectal prolapse, and fecal impaction.

Procidentia

Internal rectal intussusception (rectal intussusception, internal intussusception, internal rectal prolapse, occult rectal prolapse, internal rectal procidentia and rectal invagination) is a medical condition defined as a funnel shaped infolding of the rectal wall that can occur during defecation.
It normally refers to uterine prolapse, but it may also refer to rectal prolapse.

Hemorrhoid

hemorrhoidshaemorrhoidspiles
Most sources define mucosal prolapse as an external, segmental prolapse which is easily confused with prolapsed (3rd or 4th degree) hemorrhoids (piles).
Other conditions that produce an anal mass include skin tags, anal warts, rectal prolapse, polyps, and enlarged anal papillae.

Prolapse

Tricuspid valve prolapseprolapsed uterusprolapsing
Prolapse can refer to many different medical conditions other than rectal prolapse.
Rectal prolapse is a condition in which part of the wall or the entire wall of the rectum falls out of place.

Rectum

rectalrectallyrectal ampulla
Internal rectal intussusception (rectal intussusception, internal intussusception, internal rectal prolapse, occult rectal prolapse, internal rectal procidentia and rectal invagination) is a medical condition defined as a funnel shaped infolding of the rectal wall that can occur during defecation.

Cystica profunda

gastritis cystica profunda
Another condition associated with internal intussusception is colitis cystica profunda (also known as CCP, or proctitis cystica profunda), which is cystica profunda in the rectum.
When it occurs in the colon, it is termed colitis cystica profunda.

Intussusception (medical disorder)

intussusceptionictusintro-susception
Rectal intussusception is not to be confused with other intussusceptions involving colon or small intestine, which can sometimes be a medical emergency.
An intussusception has two main differential diagnoses: acute gastroenteritis and rectal prolapse.

Anus

analperianalanal opening
Rectal prolapse is when the rectal walls have prolapsed to a degree where they protrude out the anus and are visible outside the body.

Rectal bleeding

anal
Rectal prolapse may occur without any symptoms, but depending upon the nature of the prolapse there may be mucous discharge (mucus coming from the anus), rectal bleeding, degrees of fecal incontinence and obstructed defecation symptoms.

Sigmoid colon

sigmoidsigmoid flexurecolon sigmoideum
Internal rectal intussusception (occult rectal prolapse, internal procidentia) can be defined as a funnel shaped infolding of the upper rectal (or lower sigmoid) wall that can occur during defecation.

Defecation

defecatedefecatingbowel movement
Internal rectal intussusception (rectal intussusception, internal intussusception, internal rectal prolapse, occult rectal prolapse, internal rectal procidentia and rectal invagination) is a medical condition defined as a funnel shaped infolding of the rectal wall that can occur during defecation. Internal rectal intussusception (occult rectal prolapse, internal procidentia) can be defined as a funnel shaped infolding of the upper rectal (or lower sigmoid) wall that can occur during defecation.

American Society of Colon and Rectal Surgeons

American Proctologic SocietyFASCRS
However, a publication by the American Society of Colon and Rectal Surgeons stated that internal rectal intussusception involved the mucosal and submucosal layers separating from the underlying muscularis mucosa layer attachments, resulting in the separated portion of rectal lining "sliding" down.

Mucous membrane

mucosamucous membranesmucosal
However, a publication by the American Society of Colon and Rectal Surgeons stated that internal rectal intussusception involved the mucosal and submucosal layers separating from the underlying muscularis mucosa layer attachments, resulting in the separated portion of rectal lining "sliding" down.

Submucosa

Small intestinal submucosaSubmucoussmall intestine submucosa
However, a publication by the American Society of Colon and Rectal Surgeons stated that internal rectal intussusception involved the mucosal and submucosal layers separating from the underlying muscularis mucosa layer attachments, resulting in the separated portion of rectal lining "sliding" down.

Muscularis mucosae

muscularis mucosamuscularismuscularis layer
However, a publication by the American Society of Colon and Rectal Surgeons stated that internal rectal intussusception involved the mucosal and submucosal layers separating from the underlying muscularis mucosa layer attachments, resulting in the separated portion of rectal lining "sliding" down.

Ulcer

ulcersulcerationulcerative
It describes ulceration of the rectal lining caused by repeated frictional damage as the internal intussusception is forced into the anal canal during straining.

Skin condition

Skin lesionskin diseasepustule
The perianal skin may be macerated (softening and whitening of skin that is kept constantly wet) and show excoriation.

Edema

dropsyoedemaswelling
These may reveal congestion and edema (swelling) of the distal rectal mucosa, and in 10-15% of cases there may be a solitary rectal ulcer on the anterior rectal wall.

Neoplasm

tumortumorstumour
Rarely, a neoplasm (tumour) may form on the leading edge of the intussusceptum.