White pulp

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White pulp
Transverse section of a portion of the spleen. (Lymphatic nodule labeled at center right.)
Illu spleen.jpg
Latin noduli lymphoidei splenici
Gray's subject #278 1285
Artery trabecular artery
Vein trabecular vein
Precursor mesoderm
Dorlands/Elsevier n_09/12576042

The altered coat of the arterioles, consisting of adenoid tissue, presents here and there thickenings of a spheroidal shape, the white pulp (Malpighian bodies of the spleen, splenic lymphoid nodules).

These bodies vary in size from about 0.25 mm. to 1 mm. in diameter.

They are merely local expansions or hyperplasiae of the adenoid tissue, of which the external coat of the smaller arteries of the spleen is formed.

They are most frequently found surrounding the arteriole, which thus seems to tunnel them, but occasionally they grow from one side of the vessel only, and present the appearance of a sessile bud growing from the arterial wall.

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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.