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Megacolon is an abnormal dilation of the colon (also called the large intestine). [ 1 ] [ 2 ] This leads to hypertrophy of the colon. [ 2 ] The dilation is often accompanied by a paralysis of the peristaltic movements of the bowel.
Most children develop signs and symptoms shortly after birth. However, others may be diagnosed later in infancy or early childhood. [4] [5] About half of all children with Hirschsprung's disease are diagnosed in the first year of life. [4] Complications may include enterocolitis, megacolon, bowel obstruction and intestinal perforation. [1] [2]
Toxic megacolon is an acute form of colonic distension. [2] It is characterized by a very dilated colon ( megacolon ), accompanied by abdominal distension ( bloating ), and sometimes fever , abdominal pain , or shock .
Ogilvie syndrome, or acute colonic pseudo-obstruction, is the acute dilatation of the colon in the absence of any mechanical obstruction in severely ill patients. [1]Acute colonic pseudo-obstruction is characterized by massive dilatation of the cecum (diameter > 10 cm) and right colon on abdominal X-ray.
It may occur in chronic obstruction of stool transit, as in megacolon [10] and chronic constipation. Some diseases, such as Chagas disease, Hirschsprung's disease and others damage the autonomic nervous system in the colon's mucosa (Auerbach's plexus) and may cause extremely large or "giant" fecalomas, which must be surgically removed ...
Complications include toxic megacolon, dehydration and sepsis.Such complications generally occur in young children (< 1 year of age) and immunocompromised people. A chronic course of the disease is possible; this disease process is likely to develop without a distinct acute phase.
This mass may stretch the walls of the rectum and colon, causing megarectum and/or megacolon, respectively. Liquid stool may leak around a fecal impaction, possibly causing degrees of liquid fecal incontinence. This is usually termed encopresis or soiling in children, and fecal leakage, soiling or liquid fecal incontinence in adults.
Berdon syndrome, also called Megacystis-microcolon-intestinal hypoperistalsis syndrome (MMIH syndrome), [1] is a generally fatal [2] autosomal recessive [3] genetic disorder affecting the bladder, colon, and intestines.