Visualizing the gastric wall with a 30-MHz ultrasonic miniprobe: ex vivo imaging of normal gastric sites and sites of early XXXX .

@entity75 @entity5 @entity1066 @entity1711 @entity1710 @entity356
BACKGROUND: This study was performed to determine the echo layer structures of the normal gastric wall and early @entity356 when visualized with a 30-MHz ultrasonic miniprobe. METHODS: Twelve surgically resected gastric specimens were used for an ex vivo study. Eighteen normal sites and 12 early @entity356 sites were scanned with an Olympus (XUM-S30-25R) probe with a frequency of 30-MHz. Endoscopic ultrasound images were compared with corresponding histopathologic sections stained with @entity1710 and @entity1711 . RESULTS: The normal mucosa was visualized as at least four alternating echo layers; the muscularis mucosa was delineated at all normal sites. Lymphoid aggregates within the mucosa could be seen. The submucosa was clearly visualized in most cases, but the muscularis propria and subserosa were seldom depicted due to attenuation of ultrasound waves. At the sites of @entity356 , the layered architecture of the mucosa was disturbed by an irregular @entity75 . Minimal submucosal infiltration (400 and 750 micrometer) was clearly depicted in two cases, without @entity1066 at or around the @entity5 site. However, attenuation at the site of a deep @entity1066 scar prevented adequate visualization of the @entity5 extent in two other cases with @entity1066 . CONCLUSION: A 30-MHz ultrasonic miniprobe may provide additional imaging information of the gastric wall and could play a role in the assessment of early @entity5 .
