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postcapillary venule

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venule /ven·ule/ (ven´ūl) any of the small vessels that collect blood from the capillary plexuses and join to form veins.ven´ular
postcapillary venule  venous capillary.
stellate venules of kidney  stellate veins of kidney.
straight venules of kidney  venules that drain the papillary part of the kidney and empty into the arcuate veins.

post·cap·il·lar·y venule (pst-kp-lr)
n.
Histamine-sensitive microvasculature that is the site of extravasation of blood cells. Also called pericytic venule.

postcapillary
a venous capillary.

postcapillary venule
located in lymphoid tissue these are the site of recirculation of the lymphocytes from the blood to the lymphoid tissue.


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3) The following can also be observed: proteinaceous deposits in germinal centers, vascularization of germinal centers (Figure 1), necrosis of germinal centers, polykaryocytes (Warthin-Finkeldey-type giant cells), eosinophils in germinal centers, eosinophilic folliculolysis, eosinophilic microabscesses, postcapillary venule proliferation, stromal sclerosis, perivenular sclerosis, rare giant cells (Warthin-Finkeldey-type giant cells), or small eosinophilic granulomas.
Increased permeability results mainly from actions of histamine on postcapillary venules, where histamine causes the endothelial cells to contract and separate at their boundaries (Goodman-Gilman, 1990) by mediating mostly the [H.
Kimura disease tends to have a triad of follicular hyperplasia, infiltration by eosinophils, and proliferation of postcapillary venules.
 
 
 
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