Antenatal differential diagnosis of congenital chloride diarrhea: a case report.

Congenital chloride diarrhea (CCD) is a rare disease characterized by profound, watery diarrhea. It is inherited as an autosomal recessive trait and is caused by a dysfunction of electrolyte transport in the brush border of the ileum. CCD is a medically treatable condition but is frequently misdiagnosed as a surgically treatable condition, such as bowel obstruction, because of similar antenatal ultrasonographic findings. Therefore, a correct diagnosis is of upmost importance before treatment initiation. Although some methods for antenatal differential diagnosis were reported, antenatal diagnosis of CCD remains difficult. Here, we report the case of a patient with CCD, which was presumed antenatally and confirmed postnatally. We also discuss the results of antenatal ultrasonography and amniocentesis and provide some tips regarding ultrasonographic findings for the antenatal differential diagnosis of CCD. Further, we present a brief literature review.