Fig. 1From: A subcentimeter duodenal neuroendocrine neoplasm with a liver metastasis upgraded to G3: a case reporta Esophagogastroduodenoscopy showing a submucosal lesion in the duodenal bulb. b Endoscopic ultrasound showing a submucosal lesion with 8 mm in size. The numbers (1–5) indicate the order of the layers. *Thickened fourth layer beneath the lesion. c Hematoxylin and eosin staining and immunohistochemistry for d chromogranin A and e Ki-67 of the biopsy specimenBack to article page