Questions tagged [embryology]

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Why does congenital duodenal obstruction cause a “double bubble” sign to appear on imaging?

Duodenal obstruction is caused by failure of recanalization of the duodenum during embryological organogenesis. It classically presents as a "double bubble" sign on x-ray or ultrasound. I understand ...
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Why does hydrops fetalis occur in erythroblastosis fetalis?

I understand the pathophysiology of hydrops fetalis and erythroblastosis fetalis independently, but not why the edema occurs during erythroblastosis fetalis. For example, Langman's Embryology has ...