Abstract
We reviewed on clinical usefulness of narrow band imaging (NBI) colonoscopy in improvement of detection of neoplasia, differential diagnosis between neplasia and nonneoplasia, pit pattern diagnosis, histological atypia and invasion depth diagnosis of colorectal neoplasia. At present, NBI is commonly considered to be useful in differential diagnosis between neplasia and non-neoplasia & pit pattern diagnosis for regular pit without chromoendoscopy. Furthermore, NBI magnification is expected to be useful in histological atypia and invasion depth diagnosis through the detection of thick/irregular vessels and its distribution on the lesion surface. Advantage of NBI magnification is to be able to achieve the diagnosis without chromoagents. Further detailed study and critical discussion are needed to establish a practical classification of NBI magnification findings for histological atypia and invasion depth diagnosis of colorectal tumor.
