lymphoid follicle


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Related to lymphoid follicle: lymphoid tissue, Lymph system

lymphoid follicle

A densely-packed, spherical or ovoid aggregation of B lymphocytes that forms a lymphocyte proliferation and maturating zone in a lymphoid tissue, such as a lymph node.
Synonym: lymph follicle
See also: follicle
References in periodicals archive ?
1973) Pinocy tosis by epithelium associated with lymphoid follicles in the bursa of Fabricius, appendix, and Peyer's patches.
Stage 3: Even more prominent lymphocytic infiltration, with lymphoid follicle formation, parenchymal atrophy, peri-ductal hyalinization, and sclerosis.
Many of these cells were forming lymphoid follicles.
The following additional 5 features were closely ranked: peripheral lymphocyte rim, peripheral lymphoid follicles, possible subcapsular sinus, residual LN in surrounding fibroadipose tissue, and thick capsule.
The number of surface intraepithelial lymphocytes per 100 epithelial cells, counted in areas of high lymphocytic density in a sequential manner and avoiding epithelium overlying lymphoid follicles.
F, Lymphoplasmacytic infiltration with lymphoid follicles (white arrows).
All the biopsies revealed almost similar histopathological features and consisted of necrotic antral mucosa, proliferating fibrous tissue, and bands of hyalinized collagen with dense chronic lymphoplasmacytic infiltrates with formation of lymphoid follicles and giant cells extending into the subcutaneous fat and septa along with varying stages of granulation tissue (figure 3).
The differential diagnosis includes Masson vegetant or papillary endothelial hyperplasia (a reactive endothelial proliferation associated with organizing thrombus/clot); Kimura disease (lymph node disorder, most often in Asian men, who have peripheral serum eosinophilia, reactive lymphoid follicles, follicular lysis, eosinophilic microabscesses, polykaryocytes, and IgE deposition); and angiosarcoma (freely anastomosing vessels, atypical endothelial cells, increased mitoses, necrosis).
Nodules of hyperplastic lymphoid follicles of various sizes accompanied by expanded germinal centers, numerous eosinophils, and increased vascularity were also evident.
Some lymphoid follicles of the bursa were effaced by fibrinoheterophilic infiltration admixed with yeasts, pseudohyphae, and colonies of coccoid-shaped bacteria.