Pharyngeal tonsil ('gut-associated lymphatic tissue' or GALT) (human)

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Title Pharyngeal tonsil ('gut-associated lymphatic tissue' or GALT) (human)
Creator Poels, Lambert G.
Contributor Lambert G. Poels, PhD, UMC St Radboud Nijmegen; Paul H. K. Jap, PhD, UMC St Radboud Nijmegen
Date 2010-06-11
Subject pharyngeal tonsil ; GALT; diapedesis; pseudostratified ciliated epithelium
Description Stain: Azan. The combination demonstrates stages of infiltration (=diapedesis) of lymphocytes in the epithelium of the pharyngeal tonsil. The pharyngeal tonsil or adenoid is located in the nasopharyngeal roof. The agglomerations of lymphocytes (4) are covered by (1) pseudostratified ciliated epithelium with goblet cells (2) included. Locally islands of multilayered squamous epithelium occur (A5), B3 indicate extended layering (local metaplasia). The epithelium is usually infiltrated with lymphocytes (black arrows-->), what may cause desquamation (3) of the epithelium. The blue arrows (C) indicate antigen-presenting cells (APC's) which show a large pale nucleus and a conspicuous nucleolus. The surface is enlarged by microfolds (A). Strands of connective tissue are stained blue and continue in a fine reticular tissue between the lymphocytes.
Subtype Image
Format image/jpeg
Collection Poja Histology Collection - Lymphatic Tissues and Organs Subset
ARK ark:/87278/s6ks9tv8
Setname ehsl_heal
Date Created 2012-12-11
Date Modified 2019-01-25
ID 890878
Reference URL
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