A text-book of the diseases of the ear for students and practitioners . ate of blood was found in the internal ear. (3) From extensive carious processes in the temporal bone,especially in caries and necrosis of the petrous portion (Knapp).Li several cases belonging to this category, in which the laby- HEMORRHAGES INTO THE LABYRINTH 729 rinthine capsule remained uninjured, the author found differentportions of the labyrinth, as, for instance, the cochlea, coveredwith a blackish-brown, bloody extravasate. In a man who haddied of meningitis secondary to otitis, and in whom thelabyrinthine capsule
A text-book of the diseases of the ear for students and practitioners . ate of blood was found in the internal ear. (3) From extensive carious processes in the temporal bone,especially in caries and necrosis of the petrous portion (Knapp).Li several cases belonging to this category, in which the laby- HEMORRHAGES INTO THE LABYRINTH 729 rinthine capsule remained uninjured, the author found differentportions of the labyrinth, as, for instance, the cochlea, coveredwith a blackish-brown, bloody extravasate. In a man who haddied of meningitis secondary to otitis, and in whom thelabyrinthine capsule was not eroded, the author found, onmicroscopic sections of the labyrinth, the superior semicircularcanal (a) (Fig. 325) and the ampulla? partly tilled with a bloodyextravasate (b); this surrounded the membranous semicircularcanal, which was also filled with blood (c), while the vestibuleand cochlea were entirely free. (4) From diseases of the brainand its membranes, especially in primary and tubercularmeningitis (Steinbriigge). Moos (Z. f. 0., vol. ix.) found, in a. Fig. 325. a, Section of the osseous semicircular canal; b, Extravasated blood ; c, Section ofthe membranous semicircular canal. case of deafness arising in the course of hemorrhagic pachy-meningitis, smaller and larger hemorrhagic infiltrations atvarious places of the labyrinth, in the utricle, in Rosenthals canal,and between the layers of the lamina spiralis ossea and zonadentata on both sides ; these infiltrations partly followed thecourse of the veins and partly that of the nerve fibres. Inanother case of an individual who had suffered from progressiveparalysis for thirteen years, Moos and Steinbriigge found extra-vasates of blood in the cochlea and between the acoustic observed a hemorrhagic inflammation in the semicircularcanals and vestibules of both ears in a boy four years of age,who became totally deaf during the course of tubercular basilarmeningitis. 73Q DISEASES OF THE EAR It remains to be
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