Fig. 4From: Focal form of congenital hyperinsulinism clearly detectable by contrast-enhanced computed tomography imagingHistological findings of the resected focus. a Hematoxylin eosin staining (×400). Some of the β cells within the lesion had enlarged nuclei (arrow). b Insulin staining (× 400). An increased number of insulin-positive β cells were observed within the lesionBack to article page