A Case of Matastatic Carcinoma of Anal Fistula Caused Implantation from Rectal Cancer.

Endoscopic excision of synchronous large bowel polyps in the presence of colorectal carcinoma: is the fear of malignant cell implantation justified? A systematic review of the literature

“…These have a well‐recognized role in anastomotic recurrence , suture line implantation and seeding onto stapling devices . Rarely, colorectal adenocarcinoma cells can implant into the tracks of a fistula‐in‐ano (Table ), haemorrhoidectomy scars and other miscellaneous sites of anal trauma .…”

Synchronous mucinous adenocarcinoma of the recto sigmoid revealed by and seeding an anal fistula. (A case report and review of the literature)

“…There are 24 reported cases of colonic adenocarcinima seeding into anal fistula [4] , [13] , [14] , [15] , [16] , [17] , [18] , [19] , [20] , [21] , [22] , [23] , [24] , [25] and the vast majority of cases regard male patients [5] . Marker as CK20 and CK7 can be useful in distinguishing the original from the metastatic carcinoma as the literature reports [4] , [5] .…”