Narrow-Band Imaging Magnifying Endoscopy versus Lugol Chromoendoscopy with Pink-Color Sign Assessment in the Diagnosis of Superficial Esophageal Squamous Neoplasms: A Randomised Noninferiority Trial
Table 1
Definitions and schemas of normal and abnormal microvessels.
Finding of NBI magnifying endoscopy
Definition
Schema
Normal
Superficial microvessel with a single loop but no changes in caliber or various shapes in the normal whitish mucosa (i.e., intraepithelial capillary loop (IPCL))
Abnormal
Intervascular background coloration
Brownish coloration between microvessels which differed from whitish epithelium of surrounding normal mucosa
Proliferation
The presence of a group of higher dense microvessels compared with a density of IPCLs on surrounding normal mucosa
Dilation
Diameters of a group of microvessels which were at least twice compared with those of IPCLs on surrounding normal mucosa
Tortuosity
The presence of a group of microvessels which are more greatly or sharply twisted or bent compared with IPCLs on surrounding normal mucosa
Changes in caliber
The presence of abrupt changes in vessel diameter (i.e., thickening or narrowing) in a group of microvessels
Various shapes
The presence of highly diverse morphologies in a group of microvessels
