A text-book of the diseases of the ear and adjacent organs . L ADHESIVE PROCESSES IN THE MIDDLE EAR. mucous membrane covered with several layers of cylindrical or laminated epi-thelium which were infiltrated with fat globules, the glandular layer was hyper-trophied in some cases (often through retention of secretion, Moos), in othersatrophied, once completely lacking. The mucous membrane is covered withexcrescences, papillary, or smooth and atrophic, the cartilage infiltrated with fatglobules and pigment, and sometimes atrophic. In circumscribed interstitialinflammations, however, the Eustachi
A text-book of the diseases of the ear and adjacent organs . L ADHESIVE PROCESSES IN THE MIDDLE EAR. mucous membrane covered with several layers of cylindrical or laminated epi-thelium which were infiltrated with fat globules, the glandular layer was hyper-trophied in some cases (often through retention of secretion, Moos), in othersatrophied, once completely lacking. The mucous membrane is covered withexcrescences, papillary, or smooth and atrophic, the cartilage infiltrated with fatglobules and pigment, and sometimes atrophic. In circumscribed interstitialinflammations, however, the Eustachian mucous membrane is. as a rule,normal, and the tube is therefore completely permeable. This holds good,however, only in the majority of cases; for, just as in cases where there havebeen adhesive processes, after catarrh has passed away, there may remain afreely permeable and even very wide Eustachian canal (v. Troltsch), so weoften find a pronounced stricture of the Eustachian tube in the circumscribedforms of inflammation in the tympanic cavity. ^<:H. ?^ orI Fig. 12S.—Anterior Section through the Niche of the Fenestra Rotundain a Woman aged SO Years. Thickening and Hypertrophy of theMucous Membrane covering the Fenestra Rotunda following MiddleEar Catarrh. pr, Promontory; /*. /, Membrana fenestr. rotunda? ; e, Hypertrophic mucous the membr. fenestr. rotund. (After a preparation in my collection.) The alterations in the muscles of the Eustachian tube are of consequencein so far as by their decreased power of action the necessary ventilation ofthe middle ear is interrupted. Besides the paralytic conditions to which wewill revert later on. we must especially mention fatty degeneration of themuscular apparatus of the pharyngeal portion of the tube met with in casesof long-standing inflammation of the naso-pharynx. also atrophy and cica-tricial contraction of the muscles as consequences of ulceration (syphilis,scrofula) of the naso-pharyngeal mucous membrane, re
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Keywords: ., bookcentury1800, bookdecade1890, booksubjecteardiseases, bookyear
