咽頭·食道の拡大内視鏡観察 拡大内視鏡所見(IPCLパターン分類)と超·拡大内視鏡所見(EGA分類)

摘要

Standard magnifying endoscopy has around 100 fold magnifying power.Intra-epithelial papillary capillary loop (IPCL) pattern is diagnosed with it. Narrow band imaging system (NBI) is extremely useful to recognize IPCL well as a brown spot. In IPCL type classification,type I mainly includes normal epithelium.Type II corresponds to inflammatory change or non-neoplastic tissue and type HI reflects border line lesions. Type IV strongly suggests carcinoma in situ. TypeV-1 is definitely diagnosed as carcinoma in situ.Endocytoscopy has around 500 fold magnification,which enables observation of cell and nucleus. Endocytoscopic images are classified into 5 categories from normal epithelium to malignant tissue as endocytoscopic atypism classification (ECA classification). ECA IV and V are considered to be treated in clinical setting.