. Diseases of the ear : a text-book for practitioners and students of medicine. e channels (Fig. 152), narrowing their calibre and intime even leading to a complete obliteration of their the early stages this deposit is cellular in structure; but ifthe patient survives the disease for a long time, organizationof this tissue may take place, and the obliteration of the laby-rinthine passages is effected by an osseous deposit, the symp-toms depending upon the extent of the local process and uponits severity. It is recognized by the presence of the gen-eral leucaemic condition, and with t
. Diseases of the ear : a text-book for practitioners and students of medicine. e channels (Fig. 152), narrowing their calibre and intime even leading to a complete obliteration of their the early stages this deposit is cellular in structure; but ifthe patient survives the disease for a long time, organizationof this tissue may take place, and the obliteration of the laby-rinthine passages is effected by an osseous deposit, the symp-toms depending upon the extent of the local process and uponits severity. It is recognized by the presence of the gen-eral leucaemic condition, and with the sudden appearance ofdeafness which gradually grows worse, together with vertigo,nausea, and subjective noises. The functional examinationreveals a lesion of sound-perceiving apparatus rather than one 598 COMPLICATIONS OF CHRONIC VISCERAL LESIONS. referable to those parts concerned in sound nothing can be done to stay the progress of theaffection, our efforts at treatment being as futile as those em-ployed to combat the constitutional affection. MJ. Fig. 152.—Section through the middle turn of the cochlea in a case of leucaemia,showing infiltration. (Gradenigo.*) 6>, Bone ; S. F., Scala vestibuli; S. T.,Scala tympani ; L. S., Ligamentum spiralis; A. V., Stria vascularis; A. F.,Nerve expansion in the lamina spiralis ; e, f, g, Membrana tectoria ; //, Innerhair-cells ; m, n, Cortis rods ; a, /, d, Limbus lamina spiralis ; /, Epithelium ofsulcus spiralis internus ; /, Epithelium of sulcus spiralis externus ; C. E., Outercells of Corti and Deiter ; c, c, L Claudiuss cells. Arch, fiir Ohrenheilk., vol. xxiii, p. 242. DIABETES—GOUT—RHEUMATISM. 599 Diabetes. In severe cases of diabetes the most characteristic affec-tion referable to the ear is the occurrence of acute circum-scribed external otitis. When we remember how prone thediabetic patient is to furunculosis, we can explain the occur-rence of the aural lesion upon the same ground. Eczema ofthe
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