Echogenic bowel can be a sign of which of the following conditions?

Echogenic bowel is a sonographic finding that can suggest several underlying conditions, but it is particularly associated with cystic fibrosis. In cystic fibrosis, the bowel may appear echogenic due to the presence of thickened meconium or changes in bowel composition that can occur as a result of the disease.

This finding can also raise concerns for potential issues such as intestinal obstruction or other complications that arise in the context of cystic fibrosis. While echogenic bowel can also be seen in some chromosomal abnormalities (such as trisomy 21 and other conditions), it is most specifically and prominently noted in cases of cystic fibrosis, where it serves as a potential marker warranting further investigation.

Other options presented, while they have their own implications and diagnostic considerations, do not have echogenic bowel as a classic association. For instance, trisomy 13 does have a range of ultrasound findings but is not specifically linked to echogenic bowel as cystic fibrosis is. Likewise, fibroadenomas are breast lesions not related to echogenic bowel findings, and pyloric stenosis primarily involves the gastric outlet and would not typically be associated with echogenicity of the bowel on ultrasound. This makes cystic fibrosis the most relevant answer in this scenario.