The hedgehog contains rich lymphoid tissue in its small intestine, and diffuse lymphocytes or lymphoid nodules
are widely distributed in the epithelium and lamina propria, which together constitute the biological basis of mucosal immunity.
If we consider the changes in the cellular composition of lymphoid nodules in the whole in animals of one age group (2-3 yrs), it turns out that in case of helminthic infestation the number of stromal cells increased by 2 times.
In lymphoid nodules (l/n), there is more dense distribution of cells on a standard cut area by increasing the number of small lymphocytes and stromal cells (Figure 5).
(B) Solitary lymphoid nodule (arrow) in lamina propria of fanclus abomasi.
(A) Solitary lymphoid nodule (arrow) of pyloric gland region.
Photomicrograph showing mucosal glands entering lymphoid tissue of proximal colon of 6 month old buffalo calf by disintegration of lamina muscularis mucosae, lymphoid nodules
with germinal center (GC), without GC (stars), lymphoglandular complex (LGC) also without GC and is enclosed by its own lamina muscularis mucosae (dotted arrow) (Haematoxylin and Eosin X40).
Bone marrow lymphoid nodules
in myeloproliferative disorders: association with the non-myelosclerotic phases of idiopathic myelofibrosis and immunological significance.
M cells were previously found on the FAE overlying the dome structure of aggregated lymphoid nodules
in the small intestine of humans, as well as in the colon and rectum of mouse (Miller et al., 2007), and they have been identified in a 17-week-old human fetus, the bursa of Fabricius of 15-day-old chick embryos, the ileum of a 7-month-old bovine fetus, and in rats, mice and rabbits (Davis & Owen, 1997).
Endoscopic appearances of colonic lymphoid nodules
: new faces of an old histopathological entity.
Role of Helicobacter pylori in the pathogenesis of gastric carcinoma and progression of lymphoid nodules
All 3 biopsy specimens showed homogeneous eosinophilic material with scattered dense, periductal, and perilobular lymphoid nodules
, similar to the previous biopsy specimens, except for the focal confluent areas.