A text-book of the diseases of the ear and adjacent organs . eous tissue, or fromnecrosis and exfoliation of bone in masses, there arises at individualplaces considerable enlargement of the cavities, and consequently in-creased communication between the meatus, the mastoid process, 444 CARIES OF TEMPORAL BONE IN SUPPURATION OF MIDDLE EAR. and the tympanum; while at other parts, especially in the vicinityof carious portions, the cavity is considerably contracted by diffuse,sclerosed osteophytes, or more frequently by flat, reticularly fene-strated ones (Zuckerkandl). The latter rise to a consid
A text-book of the diseases of the ear and adjacent organs . eous tissue, or fromnecrosis and exfoliation of bone in masses, there arises at individualplaces considerable enlargement of the cavities, and consequently in-creased communication between the meatus, the mastoid process, 444 CARIES OF TEMPORAL BONE IN SUPPURATION OF MIDDLE EAR. and the tympanum; while at other parts, especially in the vicinityof carious portions, the cavity is considerably contracted by diffuse,sclerosed osteophytes, or more frequently by flat, reticularly fene-strated ones (Zuckerkandl). The latter rise to a considerable heighton the walls of the air-spaces in the mastoid process in chronicinflammation of the middle ear, or are at first filled with granulationtissue, which afterwards becomes ossified into a solid mass. Simultaneously with caries of the temporal bone, one generallyfinds extensive changes in the lining membrane of the middle earand of the meatus, as well as in the membrana tympani and in theossicula. The mucous membrane is not unfrequently found to be. c b Fig. 247.—Microscopic Section of the Carious Articulation of the Malleusand Incus in a Woman, 32 Years old, who died from an Absckss in theCerebellum, and who had suffered from Otorrhcea from Childhood. a, Head of malleus ; b, Body of the incus ; c, Capsular ligament; d, Cavity of thejoint opened by erosion of the capsular ligament ; e e, Enlarged osseous spacesfilled with round cells. ulcerated, or changed into a spongy granulation tissue, wholly orpartially filling the cavities of the middle ear, and growing out intothe meatus, or studded with polypoid proliferations. The dirty-gray and bad-coloured granulations, often filled with micro-organisms,which spring up in the region of carious and necrotic collections andupon carious bases as well as caseous degenerated masses of chole-steatoma, hinder the healing of the bone disease. The lining mem-brane of the meatus, especially in its osseous portions, appearsinfiltrated
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Keywords: ., bookcentury1800, bookdecade1890, booksubjecteardiseases, bookyear
