8) Several different terms have been used in the literature to describe these cysts ranging from tailgut cyst to retrorectal hamartoma, cyst of the postanal intestine, mucus-secreting cyst, retrorectal cyst and enterogenous
The differential diagnosis seen on MRI includes ganglion cysts, ependymal cysts, synovial cysts, epidermoid cysts or dermoid cysts, enterogenous
cysts, teratogenous cysts, hydatid cysts, and intervertebral disc cysts (5,6).
Abnormal echogenic stripes or enterogenous
myometrium are suggestive of adenomyosis and should be followed by MRI, which is more sensitive and better defines the uterine cavity than ultrasound.
The most frequent causes of enterogenous
malabsorption (malabsorption caused by a defect in the intestine) are sprue, blind loop syndrome, obstruction of the lymphatic flow of the small bowel, small bowel inflammatory disease, and shortened bowel.
Other nonneoplastic cysts, such as mucinous nonneoplastic cyst of the pancreas, (113) congenital cysts, (110) single true cysts, (114) lymphoepithelial cysts, (115) enterogenous
cysts, (116) and endometrial cysts, (117) or schwannoma of the pancreas with cystic appearance118 are extremely rare.
1) Known causes of intussusception in infants and children include lymphoma, lymphoid polyp, Meckel diverticulum, ectopic pancreas, acute appendicitis, leiomyoma, juvenile polyp, polyposis, enterogenous
cyst, and duplication cyst.