Gastroenterology Research, ISSN 1918-2805 print, 1918-2813 online, Open Access
Article copyright, the authors; Journal compilation copyright, Gastroenterol Res and Elmer Press Inc
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Case Report

Volume 2, Number 4, August 2009, pages 238-241

Non-invasive Adenocarcinoma of the Vermiform Appendix: Incidence and Report of Four Cases among 512 Appendectomies

Figures

Figure 1.
Figure 1. (a) Low power view of papillary adenocarcinoma of the appendix in case 1. Papillary proliferation is apparent. No invasion is seen. HE, x 20. (b) Higher power view of Figure 1A. The cellular atypia is evident. HE, x 200. (c) The tumor cells are positive for p53 protein, Immunostaining, x 200. (d) The Ki-67 labeling is 90%. Immunostaining, x 100.
Figure 2.
Figure 2. Flat type adenocarcinoma in case 2. HE, x 200.
Figure 3.
Figure 3. (a) The resected appendix shows cystic dilation (arrow) in case 3. (b) The cystic lining is adenocarcinoma cells. HE, x 100. (c) The cellular atypia is enough to be regarded as adenocarcinoma. HE, x 200.
Figure 4.
Figure 4. (a) Loupe figures of appendiceal mucinous adenocarcinoma in case 4. Papillary epithelial proliferation and intraluminal mucus are evident. No invasion of tumor cells is recognized. (b) Higher power view of the mucosa of the appendix. Papillary adenocarcinoma is evident. HE, x 200. (c) The intraluminal area show adenocarcinoma cells and much mucus. HE, x 200.