Mucinous neoplasm of the appendix: A case report and review of literature

Figure 6 Histological examination of the lesion revealing characteristic patterns. A: A 200 × magnification image showing slender villi lined by tall mucinous epithelial cells with low-grade dysplasia; B: A 400 × magnification image demonstrating tall mucinous epithelial cells with low-grade dysplasia, set within a fibrous stromal framework; C: Immunohistochemical staining displaying positive CDX2 expression in the villous cells; D: Immunohistochemical staining displaying positive CDX20 expression in the villous cells; E: Immunohistochemical staining displaying positive SATB2 expression in the villous cells; F: Immunohistochemical staining displaying positive MUC2 expression in the villous cells; G: Immunohistochemical staining showing the villous cells negative for CK7; H: Immunohistochemical staining showing the villous cells negative for PAX8.Collective histopathological and immunohistochemical findings indicate the lesion to be a low-grade appendiceal mucinous neoplasm. The evaluation of surgical margins shows no neoplastic presence, indicating a clear disease-free status.