耳管狭窄症の病理組織学的研究
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概要
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The stenosis of Eustachian tube was studied histopathologically. Since there is no change. in the finding of retraction of the ear drum after death, from the condition of the ear drum in post mortum examination, the presence of the tubal stenosis was presumed.In this study the serial section of the temporal bone from 11 cases including the one case with the tubal stenosis with the retraction of the ear drum and 3 cases without retraction, were microscopically examined.The results obtained were as follows:1) The degeneration and the falling out of the epithelium were observed in many cases with retraction.2) There was no relation between the amount of goblet cells and the degree of the retraction of the drum.3) There was no difference in number of glands in those with retracted drums and those without retraction of ear drums.4) The exudate was seen commonly in the portion of the isthmus.5) The developement of lymphoid tissue was prominent in the cases with the retraction of the ear drum.6) The infiltration of polymorphnuclear leucocytes in the mucosa of tube was more prevalent in the cases with retraction than in the cases without retraction, and these leucocytes were found to be wandering into the epithelium.7) The chronic inflammatory reaction of the mucous membrane in the retracted cases appeared to be more prominent than in the un-retracted cases.8) The inflammation of the mucosa in the tympanum was not so serious as that of tubal portion.9) Acute catarrhal inflammation, in two cases of a baby and an infant, was observed in the mucosa of tympanum.10) The tubal lumen was partially narrowed in only one cases, but no cicatricial obstraction was found in any cases.11) In one case, the marked prominence of tubal wall by the lymph, follicles was found in the pharyngeal portion, but in generally the lymphoid tissue in the mucosa of tube, was poorly developed.12) The author stressed that inflammatory changes of the tubal mucosa and the accumulation of inflammatory exudate in tubal lumen, were the important causes of the tubal stenosis, and the prevention and treatment of tubal stenosis would be accomplished by keeping the normal respiratory air current in the nasal and nasopharyngeal cavities.