Table I.

Abnormal lesions of esophagus under routine endoscopy.

Abnormal lesions	Characteristics
Irregular	Mucosa was focally or diffusely irregular, with prominent wrinkling
Small white patch	Focal raised or flat white patch, with smooth distinct borders, usually <1 cm in greatest dimension
Focal red area	Focal flat red area not caused by mucosal contact
Erosion	Focal defect in the mucosa, the erosions were subcatergorized as linear, punched-out, or broad-based, depending on their shape and size
Plaque	Mucosa was focally thickened and raise, with irregular indistinct borders and occasional shallow surface erosions, usually were >1 cm in greatest dimension