A text-book of the diseases of the ear and adjacent organs . uromata described by Yirchow (Geschiriilste, ii.) and Klebs/. Vierteljahrschr., 1877) belong in the ma;: rity :: cases to thegliomata. In the large majority of cases the new-formations of the internalear are to be regarded as secondary, extending to the labyrinth or NEW-FOEMATIONS IN THE INTERNAL EAE. 655 the stem of the auditory nerve from the middle ear or the cranialcavity. Of the new-formations of the external and middle ears, it is forthe most part the epitheliomata and the malignant round-celledsarcomata that involve the petrou
A text-book of the diseases of the ear and adjacent organs . uromata described by Yirchow (Geschiriilste, ii.) and Klebs/. Vierteljahrschr., 1877) belong in the ma;: rity :: cases to thegliomata. In the large majority of cases the new-formations of the internalear are to be regarded as secondary, extending to the labyrinth or NEW-FOEMATIONS IN THE INTERNAL EAE. 655 the stem of the auditory nerve from the middle ear or the cranialcavity. Of the new-formations of the external and middle ears, it is forthe most part the epitheliomata and the malignant round-celledsarcomata that involve the petrous bone and the labyrinth. Thereare no exact histological observations on the character of the ex-tension of the new-formation in the labyrinth except the followingcase of secondary epithelioma of the cochlea which was observed byme. The patient, aged 47. in whom an ulcerating epithelial carcinoma developedon the mastoid, during the course of a year, simulating a chronic middle-earsuppuration, with the formation of polypi. It extended to the petrous portion. Fig. 319. of the temporal bone and the cranial cavity, and ended fatally with erysipelasof the face and head. Microscopical examination of the labyrinth gave the following result :The apex of the cochlea turned towards the tympanic cavity was openedbv cancerous destruction of the inner wall of that cavity (Fig. 319, a), thecancerous growth thereby entering into the interior of the cochlea. Thelamina spiralis in the second and third coils was here and there brokenthrough, and the scala tympani as well as the scala vestibuli were partly rilledup by an accumulation of cancer-cells (6). Of particular interest was the condition of the first coil of the cochlea : thelamime spirales ossea was intact: in the scala vestibuli, on the external wallof the ductus cochlearis, there was a group of cancer-cells, which extendedalong the membrana basilaris up to Cortis organ {). In the scala tym-pani of the one side was a lobulated cancero
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Keywords: ., bookcentury1800, bookdecade1890, booksubjecteardiseases, bookyear
