What is the disease 'mega colon' that will clog poop and rupture the intestines?

A man who was suffering from terrible constipation received emergency surgery due to intense abdominal pain and diarrhea, but it turned out that the colon was ruptured due to excessive clogging of feces. A doctor in charge of the operation reported that the man was caused by constipation due to " mega colon " (giant colon disease) and bowel obstruction (hypoplasia).

Bowel perforation in chronic idiopathic megarectum and megacolon - Anyaegbuna et al. 2018 - BMJ Case Reports
http://casereports.bmj.com/content/2018/bcr-2018-225406

Explosive case of poop-packed "megacolon" prompts warning from doctors | Ars Technica
https://arstechnica.com/science/2018/08/explosive-case-of-pop-packed-megacolon-prompts-warning-from-doctors/

A 24 - year - old British man who had been suffering from chronic constipation for a long time suffered sudden abdominal pain and diarrhea one day and visited an emergency outpatient at a local hospital. The man prescribed laxatives and enemas (kanji) according to the doctor in charge, but even so, abdominal pain and diarrhea did not go away, it seemed rather worse.

Two days later, a man who visited the hospital again got an X-ray examination, the male's rectum and the sigmoid colon were packed with unusual amounts of feces, and the man swelling more than three times as healthy adults It was confirmed. Since it was also found that a part of the colon was ruptured, emergency surgery was performed, and the man cut a colon and took a survival.

A doctor in charge investigated and found that the disease called "idiopathic mega colon" caused chronic constipation that caused the male colon to rupture.

" Colon " which absorbs moisture and nutrients is a caecum, colon, rectum, it is a digestive organ which stores feces until it is excreted. "Megacolone (giant colon disease)" in which a male is diagnosed is a disease that causes long-term constipation due to dilated enlargement of the colon, which is a part of the large intestine, causing intestinal obstruction and bowel movement.

by CNX OpenStax

" Hirschsprung's disease " which is a congenital mega colon has been found to develop due to absence of neurons in the colon by nature. On the other hand, an acquired mega colon "idiopathic mega colon" is acquired and there are few cases, so it is not clearly understood why it occurs. According to a paper published in Japan, there are only 58 cases of acquired mega colon reported in Japan.

Idiopathic mega colon has a poor therapeutic effect with medicine, and it is regarded as the best judgment of colon resection by surgical operation. A doctor in charge of a British male said, "If it is mild, it may be improved by changing laxatives / enemas, eating habits to healthy ones, but if they still do not improve, they should receive surgical treatment early It is important. "