Rupture of small cystic pancreatic neuroendocrine tumor with many microtumors

Figure 6 Microscopic findings for the resected pancreas. A: The main lesion (red arrow) comprises cells with round nuclei arranged in sheets or rosettes (hematoxylin and eosin, × 4); B: Less than 2 mitoses per 50 high-power fields are evident (hematoxylin and eosin, × 40); C and D: The other microtumors (red arrow) show similar findings (hematoxylin and eosin; C, × 4; D, × 10); E: The peripheral rim appears broken at one site, and fibrosis (red arrow) is evident with inflammation (hematoxylin and eosin, × 10). A trace of a cystic lumen is apparent below the red arrow.