Abstract
Although mucosal prolapse syndrome (MPS) of the rectum is a relatively rare disease, recently reports of the disease are gradually increasing. We experienced 3 cases of MPS of the rectum, which were different from each other in macroscopic findings.
Case 1 is a 21-year-old man who had a habit of straining, complaining of diarrhea and bloody stool. Examinations showed an elevated lesion at the anterior wall of the lower rectum, and the transrectal excision of the tumor was performed. It had a mucinous cyst in the submucosa and was histologically diagnosed as MPS. The patient was followed on ambulant basis, around 7 months after operation bloody stool occurred and recurrence of elevated lesion was found. Case 2 is an 18-year-old woman complaining of anal bleeding, Examinations showed four nodular polypoid lesions, occupying the entire circumference of the lower rectum. Diagnostic excision was performed and diagnosis of MPS was made. Case 3 is a 39-year-old woman complaining of anal bleeding, who has rectal prolapse since 10 years before. Examinations showed a shallow, well demarcated ulcerative lesion at the anterior wall of the lower rectum. The patient was advised not to strain on defecation and has been asymptomatic for 4 years. Endoscopically, the ulceration became smaller, but another flat type of MPS appeared at the oral side of the lesion.
