Here in the stomach, a trichrome stain demonstrates a blue submucosa because of the extensive fibrosis.
图示胃粘膜下层广泛纤维化，三色染色呈蓝色。
Seen here is a fissure extending through mucosa at the left into the submucosa toward the muscular wall, which eventually will form a fistula.
左边可见裂缝从黏膜延伸到黏膜下层、肌层，最终形成瘘管。
This is normal esophageal squamous mucosa at the left, with underlying submucosa containing mucus glands and a duct surrounded by lymphoid tissue. The muscularis is at the right.
图左边示正常食管鳞状上皮黏膜，黏膜下层内粘液腺体，以及由淋巴组织包围的腺体导管。图右侧示食管肌层。
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