PROBLEM TO BE SOLVED: To provide a novel cancer tissue diagnosis marker which can diagnose a precise range of a cancer-deseased tissue for the endoscope curing of cancer.SOLUTION: There are provided a colon cancer tissue diagnosis agent containing mannose-binding protein (MBP), an endoscope curing auxiliary agent, a prognostic diagnosis agent and a metabasis suppressant. There is also provided a colon cancer endoscope curing device in which tissue diagnosis agents containing the MBP are dispersed via a water-senidng channel or a forceps channel of an endoscope.COPYRIGHT: (C)2013,JPO&INPIT【課題】がんの内視鏡治療のためのがん病変部の正確な範囲診断が可能な、新規がん組織診断マーカーを提供すること。【解決手段】マンナン結合タンパク質(MBP)を含有してなる、大腸がんの組織診断剤、内視鏡治療補助剤、予後診断剤及び転移抑制剤。内視鏡の送水チャネル又は鉗子チャネルを通じて、MBPを含有する組織診断剤が散布される、大腸がんの内視鏡治療用装置。【選択図】なし