Cystica profunda is characterized by formation of mucin cysts in the muscle layers of the gut lining, and it can occur anywhere along the gastrointestinal tract. When it occurs in the rectum, some believe to be an interchangeable diagnosis with SRUS since the histologic features of the conditions overlap. Indeed, CCP is managed identically to SRUS.Electromyography may show pudendal nerve motor latency. Complications
Complications are uncommon, but include massive rectal bleeding, ulceration into the prostate gland or formation of a stricture. Very rarely, cancer can arise on the section of prolapsed rectal lining. Diagnosis and investigations
SRUS is commonly misdiagnosed, and the diagnosis is not made for 5–7 years. Clinicians may not be familiar with the condition, and treat for Inflammatory bowel disease, or simple constipation.The thickened lining or ulceration can also be mistaken for types of cancer.The differential diagnosis of SRUS (and CCP) includes:
polyps
endometriosis
inflammatory granulomas
infectious disorders
drug-induced colitis
mucus-producing adenocarcinomaDefecography, sigmoidoscopy,  transrectal ultrasound, mucosal biopsy, anorectal manometry and electromyography have all been used to diagnose and study SRUS. Some recommend biopsy as essential for diagnosis since ulcerations may not always be present, and others state defecography as the investigation of choice to diagnose SRUS. Treatment
Although SRUS is not a medically serious disease, it can be the cause of significantly reduced quality of life for patients. It is difficult to treat, and treatment is aimed at minimizing symptoms. Stopping straining during bowel movements, by use of correct posture, dietary fiber intake (possibly included bulk forming laxatives such as psyllium), stool softeners (e.g.
It is different to an internal intussusception (occult prolapse) or a complete rectal prolapse (external prolapse, procidentia) because these conditions involve the full thickness of the rectal wall, rather than only the mucosa (lining).Mucosal prolapse is a different condition to prolapsing (3rd or 4th degree) hemorrhoids, although they may look similar. Rectal mucosal prolapse can be a cause of obstructed defecation (outlet obstruction). and rectal malodor. Symptoms
Symptom severity increases with the size of the prolapse, and whether it spontaneously reduces after defecation, requires manual reduction by the patient, or becomes irreducible. The symptoms are identical to advanced hemorrhoidal disease, and include:

Fecal leakage causing staining of undergarments
Rectal bleeding
Mucous rectal discharge
Rectal pain
Pruritus ani

Cause
The condition, along with complete rectal prolapse and internal rectal intussusception, is thought to be related to chronic straining during defecation and constipation. Mucosal prolapse occurs when the results from loosening of the submucosal attachments (between the mucosal layer and the muscularis propria) of the distal rectum. The section of prolapsed rectal mucosa can become ulcerated, leading to bleeding. Diagnosis
Mucosal prolapse can be differentiated from a full thickness external rectal prolapse (a complete rectal prolapse) by the orientation of the folds (furrows) in the prolapsed section. In full thickness rectal prolapse, these folds run circumferential. In mucosal prolapse, these folds are radially. The folds in mucosal prolapse are usually associated with internal hemorrhoids. Treatment
EUA (examination under anesthesia) of anorectum and banding of the mucosa with rubber bands.