Echogenic dilated bowel loops before 21 weeks' gestation: a new entity.
OBJECTIVE
The purpose of this study was to determine the outcome at birth for fetuses in which echogenic dilated bowel loops (EDBL) are detected before 21 weeks of gestation.


METHODS
A retrospective study was undertaken of 45 patients with EDBL. Sonographic criteria included dilated bowel with an echogenic wall. EDBL was divided into two categories: the isolated and the complex (associated with other abnormalities). When the EDBL affected only one quadrant of the fetal abdomen, it was referred to as the local form, and when it was observed in more than one quadrant, it was termed the diffuse form.


RESULTS
Intestinal dilatation of 2-8 mm was revealed on sonography in 21 fetuses with the isolated form of EDBL. Follow-up sonography showed resolution of EDBL in 20 cases. The outcome at birth was normal in 19 (90%) cases. The 20th fetus was born with jejunal atresia, and the remaining fetus died after cordocentesis. Twenty-four fetuses with the complex form of EDBL also had intestinal dilatation of 2-8 mm shown on sonography. Nine (38%) of these fetuses were born alive: six had gastroschisis; two had meconium peritonitis; and one had vertebral defects, imperforate anus, tracheoesophageal fistula, and radial and renal dysplasia (VATER). In these cases, resolution of EDBL was noticed at sonographic follow-up. Fourteen (58%) of the 24 fetuses were aborted. The remaining fetus died after amniocentesis. The incidence of normalcy is comparable in both local and diffuse dilatation. Amniocentesis was performed in 15 cases. Disaccharidase activity was measured in 13 patients. Low disaccharidase activity was detected in 10 (77%) of 13 cases. We saw cystic fibrosis in none of the 45 fetuses. Infection was detected before and at birth in five (11%) cases.


CONCLUSIONS
EDBL is a new entity that is most likely related to temporary obstruction. A fetus with the isolated form has a good prognosis, whereas a fetus with the complex form has an outcome directly related to the severity of associated abnormalities.
Grignon
A
A
Department of Radiology, Hôpital Sainte-Justine, Montréal, Québec, Canada.
Dubois
J
J
Ouellet
M C
MC
Garel
L
L
Oligny
L L
LL
Potier
M
M
D000328:Adult; D004108:Dilatation, Pathologic / Q000000981:diagnostic imaging / Q000453:epidemiology; D005260:Female; D005315:Fetal Diseases / Q000000981:diagnostic imaging* / Q000453:epidemiology; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D007415:Intestinal Obstruction / Q000000981:diagnostic imaging* / Q000453:epidemiology; D007422:Intestines / Q000002:abnormalities* / Q000000981:diagnostic imaging; D008297:Male; D011247:Pregnancy; D011379:Prognosis; D012189:Retrospective Studies; D016216:Ultrasonography, Prenatal