. The elements of pathological histology with special reference to practical methods . l tissue follows, the contraction of which may give rise tostrictures, with their usual consequences. Chronic catarrh is very common, especially in the vault of the naso-pharynx. In this condition the adenoid tissue of the mucous mem-brane becomes considerably increased in quantity, especially in theareas surrounding the ducts (distended with secretion) of the mucousglands, so that the mucosa acquires a granular appearance {granularjjharyngitis). The epithelium is also more or less infiltrated withleucocytes
. The elements of pathological histology with special reference to practical methods . l tissue follows, the contraction of which may give rise tostrictures, with their usual consequences. Chronic catarrh is very common, especially in the vault of the naso-pharynx. In this condition the adenoid tissue of the mucous mem-brane becomes considerably increased in quantity, especially in theareas surrounding the ducts (distended with secretion) of the mucousglands, so that the mucosa acquires a granular appearance {granularjjharyngitis). The epithelium is also more or less infiltrated withleucocytes. In many places, particularly in the region of the pharyngealtonsil, the growth of the adenoid tissue may be so considerable asto form actual tumours, the so-called adenoid vegetations. These thenappear under the microscope (Fig. 116) as conical or papilliformelevations of the mucous membrane composed of a very vascular CATARRHAL INFLAMMATION 229 round-celled tissue, with deep and much-branched fissures and sinuseslying between, into which the ducts of the mucous glands Fig. 116.—Adknoid Vegetation of the Pharynx, x 1<5. (Haernatoxylm andeosin.) a, Epithelium; &, Epithelial depressions; c, Ducts of mucous glands, cutobliquely; d, Blood-vessels. When the catarrh is of longer duration it may, however, lead toatrophy of the mucous membrane. The mucous glands in the oesophagus may become diseased not onlyin catarrhal inflammations but independently; in either case theirducts are found to contain plugs composed of desquamated epithelialcells and leucocytes, while the surrounding mucous membrane is ina state of cellular infiltration. Under certain circumstances evensuppuration with consequent development of small abscesses isobserved. By plaques opalines or leucoplacia are meant whitish patcheswhich form in irritative conditions of a more protracted character,notably on the tongue and mucous membrane of the cheeks, andare due to a circumscribed thickening and superf
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectpatholo, bookyear1895
