patch (pach)
Peyer's patches,
1. a small area differing from the rest of a surface.
2. a macule more than 3 or 4 cm in diameter.
Peyer's patches oval elevated patches of closely packed lymph follicles on the mucosa of the small intestines.
salmon patch see nevus flammeus.
Pey·er's patches or Pey·er's glands (p   rz)pl.n. |
Peyer's patches,
one of a group of solitary nodules or groups of lymph nodes forming a single layer in the mucous membrane of the ileum opposite the mesenteric attachment. They are oval patches about 1 cm wide that extend for about 4 cm along the intestine. In most individuals they appear in the distal ileum, but they also appear in the jejunum of a few individuals.
Peyer's patches
oval, elevated patches of closely packed lymph follicles in mucous and submucous layers of the small intestine. Called also aggregated lymphatic nodules.
continuous Peyer's patches
found in the terminal ileum in calves, lambs, piglets. Thought to be a primary site for B-cell generation; involute with age.
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