. A treatise on the nervous diseases of children, for physicians and students. .Torcular iFig. 124a.—The Veins of the Dura Mater. (Heitzman.) The extensive experience of aurists and a far larger collection of caseshave helped to decide many mooted points, and the successful operationsrecorded encourage one to hope that sinus thrombosis (excepting possibly aspart of a general pyaemia) will become an eminently curable disease. Explora-tory operations in doubtful cases are not only justifiable but imperativelydemanded. CHAPTER XXVIII. DISEASES AND CONDITIONS DUE TO DEFECTIVE DEVEL-OPMENT OF THE B
. A treatise on the nervous diseases of children, for physicians and students. .Torcular iFig. 124a.—The Veins of the Dura Mater. (Heitzman.) The extensive experience of aurists and a far larger collection of caseshave helped to decide many mooted points, and the successful operationsrecorded encourage one to hope that sinus thrombosis (excepting possibly aspart of a general pyaemia) will become an eminently curable disease. Explora-tory operations in doubtful cases are not only justifiable but imperativelydemanded. CHAPTER XXVIII. DISEASES AND CONDITIONS DUE TO DEFECTIVE DEVEL-OPMENT OF THE BRAIN. LARGE DEFECTS. Just as there are abnormalities of the spinal cord, due to defective closureof the vertebral arches, so there are deformities of the brain and its coveringsdue to defective closure of the skull. The various forms of protrusion arebest illustrated by Figs. 125-127, taken from Hobs Textbook. These de-. Fig. 125.—Meningocele. Fig. 126.—Encephalocele.(After Holt.) Fig. 127.—Hydrencephalocele, formities are rare and of little interest, although Treves and others haveattempted to remedy these conditions by surgical means. Most of the chil-dren thus afflicted die within a few weeks. In meningocele, the membranes only are protruded; in encephalocelesome brain substance is protruded; in hydrencephalocele the protruding brainsubstance contains a cavity which is in direct communication with the dis-tended lateral ventricle. These tumors, varying much in size, may be occip-ital or frontal; they may be covered by the scalp, or only by granulation tis-sue ; other deformities are often associated with them. Cyclops or monopus, as the name tells, indicates a condition in whichbut one orbit exists in the middle of the face, and about in the position gen-erally occupied by the root of the nose. The size of this one orbital cavityvaries according to the development of the eye. In some cases th
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