Manual of pathological anatomy . itis is not an occurrenceof frequency, but it is necessary to bear in mind that it is apathological fact. A remarkable instance of this occurred underour observation at St. Marys Hospital, in a young woman inwhom sudden and unexpected coma supervened, and after thirty-six hours terminated in death. She had previously suffered fromotorrhoea, but on her admission gave no evidence of cei^halicdisease ; nor was any direct connection traced after death betweenthe affection of the ear and the meningitis which was found tohave caused her death. Here two yellow patches
Manual of pathological anatomy . itis is not an occurrenceof frequency, but it is necessary to bear in mind that it is apathological fact. A remarkable instance of this occurred underour observation at St. Marys Hospital, in a young woman inwhom sudden and unexpected coma supervened, and after thirty-six hours terminated in death. She had previously suffered fromotorrhoea, but on her admission gave no evidence of cei^halicdisease ; nor was any direct connection traced after death betweenthe affection of the ear and the meningitis which was found tohave caused her death. Here two yellow patches were discoveredon each parietal surface of the brain, owing to an accumulation of SIMPLE ACUTE MENINGITIS. 239 pus spread out under the meninges; the microscopic examinationof the fluid satisfactorily demonstrated the characters of pus. Cases of meningitis are now and then met with, in which thearachnoid appears perfectly transparent and normal, while there isvascularity of the pia mater, with subarachnoid effusion. We Fig. Portion of upper cerebral hemisphere of a young woman, aged twenty-seven, withpurulent effusion under the arachnoid; there were two yeUow t-ymmetrical patches,one on each parietal surface, concealing the subjacent convolutions. should here be inclined to assume an idiopathic affection of the piamater, and it cannot be denied that the evidence in favour ofprimary and independent disease in that membrane is strongerthan any arguments adducible in favour of the same disposition inthe arachnoid. We cannot blind ourselves to the fact that thelatter differs much in its behaviour from the serous membranes ofthe thorax and abdomen, in the rarity of inflammatory effusionoccurring within what we must term the sac of the arachnoid, ifwe continue to look upon it in the same light as a serous mem-brane. Exudation on the external surface of the visceral arachnoidis very rarely met with, either alone or accompanying inflamma-tion of the pia mater; and seldom also sim
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectanatomy, booksubjectp
