Fig. 4

Postoperative histological pathologic diagnoses were appendiceal mucinous neoplasm, rectal cancer and PMP. The rectal cancer was medium differentiated adenocarcinoma (a). The appendiceal mass was low-grade appendiceal mucinous neoplasm (b). Large quantities of cavities containing mucus were observed in the fibrous tissue (c). Immunohistochemical staining of the rectal tumour revealed the following staining results: PTEN (++), ERRCC1 (++), VEGF (++), TS (−), EGFR (++), HER2 (0), PMS2 (+), MLH1 (++), MSH2 (+++), MSH6 (+++), and MGMT (+) (d)