Insulinoma presenting with postprandial hypoglycemia and a low body mass index: A case report

Figure 1 Positron emission tomography with 2-deoxy-2-[fluorine-18]fluoro-D-glucose integrated with computed tomography showing enhanced metabolic activity of brown adipose tissue in the neck, paravertebral, supra- and infraclavicular, axillar, mediastinal, jugular, diaphragmatic, and perinephric regions bilaterally (white arrows) and several muscle groups (e. g., psoas major muscles) (orange arrows).

Figure 2 Insulinoma (perioperative findings). A: Insulinoma as indicated by the yellow arrows was located in the upper part of the pancreatic head; B: Detailed view of the whole enucleated insulinoma; C: Detailed view of the sectioned insulinoma.

Figure 3 Histological and immunohistochemical findings of the insulinoma and histological findings of muscle biopsy. A: Positive insulin immunostaining; B: Hematoxylin and eosin staining; C: Positive synaptophysin immunostaining; D: Glycogen deficit (light violet areas) in muscle syncytia (musculus quadriceps femoris), PAS stain, 20 ×.