Digital Histology
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Aggregated lymphoid nodules: Peyer's patch

This Peyer’s patch demonstrates the accumulation of lymphoid tissues in the ileum. Although secondary nodules are usually characteristic of Peyer’s patches, none are seen here. However, primary nodules and diffuse lymphoid tissue are prevalent. Because Peyer’s patches are located in the lamina propria of the mucosa, they are part of MALT and filter tissue fluid. 200x

Peyer's patch <p>This Peyer’s patch demonstrates the accumulation of lymphoid tissues in the ileum. Although secondary nodules are usually characteristic of Peyer’s patches, none are seen here. However, primary nodules and diffuse lymphoid tissue are prevalent. Because Peyer’s patches are located in the lamina propria of the mucosa, they are part of MALT and filter tissue fluid. 200x</p>

Peyer's patch

This Peyer’s patch demonstrates the accumulation of lymphoid tissues in the ileum. Although secondary nodules are usually characteristic of Peyer’s patches, none are seen here. However, primary nodules and diffuse lymphoid tissue are prevalent. Because Peyer’s patches are located in the lamina propria of the mucosa, they are part of MALT and filter tissue fluid. 200x
Primary nodule <p>This Peyer’s patch demonstrates the accumulation of lymphoid tissues in the ileum. Although secondary nodules are usually characteristic of Peyer’s patches, none are seen here. However, primary nodules and diffuse lymphoid tissue are prevalent. Because Peyer’s patches are located in the lamina propria of the mucosa, they are part of MALT and filter tissue fluid. 200x</p>

Primary nodule

This Peyer’s patch demonstrates the accumulation of lymphoid tissues in the ileum. Although secondary nodules are usually characteristic of Peyer’s patches, none are seen here. However, primary nodules and diffuse lymphoid tissue are prevalent. Because Peyer’s patches are located in the lamina propria of the mucosa, they are part of MALT and filter tissue fluid. 200x
Diffuse lymphoid tissue <p>This Peyer’s patch demonstrates the accumulation of lymphoid tissues in the ileum. Although secondary nodules are usually characteristic of Peyer’s patches, none are seen here. However, primary nodules and diffuse lymphoid tissue are prevalent. Because Peyer’s patches are located in the lamina propria of the mucosa, they are part of MALT and filter tissue fluid. 200x</p>

Diffuse lymphoid tissue

This Peyer’s patch demonstrates the accumulation of lymphoid tissues in the ileum. Although secondary nodules are usually characteristic of Peyer’s patches, none are seen here. However, primary nodules and diffuse lymphoid tissue are prevalent. Because Peyer’s patches are located in the lamina propria of the mucosa, they are part of MALT and filter tissue fluid. 200x
Lumen of ileum <p>This Peyer’s patch demonstrates the accumulation of lymphoid tissues in the ileum. Although secondary nodules are usually characteristic of Peyer’s patches, none are seen here. However, primary nodules and diffuse lymphoid tissue are prevalent. Because Peyer’s patches are located in the lamina propria of the mucosa, they are part of MALT and filter tissue fluid. 200x</p>

Lumen of ileum

This Peyer’s patch demonstrates the accumulation of lymphoid tissues in the ileum. Although secondary nodules are usually characteristic of Peyer’s patches, none are seen here. However, primary nodules and diffuse lymphoid tissue are prevalent. Because Peyer’s patches are located in the lamina propria of the mucosa, they are part of MALT and filter tissue fluid. 200x
Mucosa <p>This Peyer’s patch demonstrates the accumulation of lymphoid tissues in the ileum. Although secondary nodules are usually characteristic of Peyer’s patches, none are seen here. However, primary nodules and diffuse lymphoid tissue are prevalent. Because Peyer’s patches are located in the lamina propria of the mucosa, they are part of MALT and filter tissue fluid. 200x</p>

Mucosa

This Peyer’s patch demonstrates the accumulation of lymphoid tissues in the ileum. Although secondary nodules are usually characteristic of Peyer’s patches, none are seen here. However, primary nodules and diffuse lymphoid tissue are prevalent. Because Peyer’s patches are located in the lamina propria of the mucosa, they are part of MALT and filter tissue fluid. 200x
Submucosa <p>This Peyer’s patch demonstrates the accumulation of lymphoid tissues in the ileum. Although secondary nodules are usually characteristic of Peyer’s patches, none are seen here. However, primary nodules and diffuse lymphoid tissue are prevalent. Because Peyer’s patches are located in the lamina propria of the mucosa, they are part of MALT and filter tissue fluid. 200x</p>

Submucosa

This Peyer’s patch demonstrates the accumulation of lymphoid tissues in the ileum. Although secondary nodules are usually characteristic of Peyer’s patches, none are seen here. However, primary nodules and diffuse lymphoid tissue are prevalent. Because Peyer’s patches are located in the lamina propria of the mucosa, they are part of MALT and filter tissue fluid. 200x
Muscularis externa <p>This Peyer’s patch demonstrates the accumulation of lymphoid tissues in the ileum. Although secondary nodules are usually characteristic of Peyer’s patches, none are seen here. However, primary nodules and diffuse lymphoid tissue are prevalent. Because Peyer’s patches are located in the lamina propria of the mucosa, they are part of MALT and filter tissue fluid. 200x</p>

Muscularis externa

This Peyer’s patch demonstrates the accumulation of lymphoid tissues in the ileum. Although secondary nodules are usually characteristic of Peyer’s patches, none are seen here. However, primary nodules and diffuse lymphoid tissue are prevalent. Because Peyer’s patches are located in the lamina propria of the mucosa, they are part of MALT and filter tissue fluid. 200x
Main SlidePeyer's patchPrimary noduleDiffuse lymphoid tissueLumen of ileumMucosaSubmucosaMuscularis externa