A text-book of the diseases of the ear and adjacent organs . hich unite withthose of the perforation, forming a cicatrix which completely fills up theorifice. Eumlers experiments on animals (A. f. 0., Bd. 30), according to which CHRONIC PURU1 HMMATIOX OF THE MIDDLE EAB. rization took place froni the external layer of epithelium, do not applyto all cases, for I could demonstrate the growth of the cicatricial tissue fromthe mucous layer of the membrana tympani in sectic: J preparations in my collection. The cicatrices of the membrana tympani appear as sharply-defineddark spots, variable in size,


A text-book of the diseases of the ear and adjacent organs . hich unite withthose of the perforation, forming a cicatrix which completely fills up theorifice. Eumlers experiments on animals (A. f. 0., Bd. 30), according to which CHRONIC PURU1 HMMATIOX OF THE MIDDLE EAB. rization took place froni the external layer of epithelium, do not applyto all cases, for I could demonstrate the growth of the cicatricial tissue fromthe mucous layer of the membrana tympani in sectic: J preparations in my collection. The cicatrices of the membrana tympani appear as sharply-defineddark spots, variable in size, mostly c at the base of which an irregular reflection of light is visible. Their form is roundish orelliptical (Fig. 1991, frequently kidney-shaped (Fig. 200), and rarelyangular. As a rule only one cicatricial depression exists on themembrana tympani, but not unfrequently two (Pig. 200) or morelike depressions are visible on the membrane,of which many are undoubtedly due to partial atrophy of theremaining membrane. The tissue of the membrane in the neigh-.


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Keywords: ., bookcentury1800, bookdecade1890, booksubjecteardiseases, bookyear