Endovesical Metastasis of a Colic Adenocarcinoma: A Case Report

Background: Bladder infiltration by neighbourhood tumors is a common situation and can be found in prostate, colo-rectum and genital tumours in women. The main mechanism is a direct invasion of the bladder by the tumor. Intraluminal bladder metastases from distant primary tumors remain exceptional. Patient: We report the case of a 56-year-old patient without any particular medical history initially admitted for an occlusion caused by a transverse colic tumor. The patient did not have clinically haematuria and the initial scan did not show a location or abnormality in the bladder. Initial surgical exploration did not find peritoneal or bladder abnormalities. The patient's evolution will be marked by the appearance of bladder thickening at a distance from the primary tumor and peritoneal carcinosis. The immunohistochemical study in addition to the anatomopathological examination resulted in positive marking of the chorion tubes by anti CDX2 and anti CK 20 and positive marking of surface vesical epithelium by anti P63, anti GATTA3 and anti CK7 which confirmed the colorectal origin of endo-vesical metastasis. Conclusion: We will try through this case report and a review of literature to shed light on this unusual situation and it is important to keep in mind the possibility of remote metastatic location at the bladder of another primary tumor.