The varioushollow viscera and tubular structures of the body are subject to acquired diverticula. Even the large blood-vessels are prone to this condition in the form of sacculated aneurysm.
Diverticula are classified into two groups, congenital and acquired. For example, a Meckel's diverticulum, or a diverticulum of the urachus connected with the bladder or umbilicus is a type of the congenital anomaly, while a diverticulum of the esophagus is one of the acquired forms.
True and false diverticula are terms describing the condition with reference to their structure, as compared to the normal walls of the viscus. Those covered with all the coats of the bowel, as represented at its site, are the true diverticula, and those with fewer coats and with the muscularis lacking at least in part are the false. True diverticula may later become false by extension beyond their muscular covering, which show in separated bundles over
MAYO CH. DIVERTICULA OF THE GASTRO-INTESTINAL TRACT: THEIR SURGICAL IMPORTANCE. JAMA. 1912;LIX(4):260–264. doi:10.1001/jama.1912.04270070259007
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