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Stuart N. Rowe and Oscar A. Turner

nearly complete closure in many cases. This has included the repair of the dural defect with a fascial graft which is left unsutured at one point for the drain and Dakin tube. If possible the original scalp wound is sutured and drainage effected through a stab wound. The exact technique of drainage must be dependent upon the site, the depth, and the character of the wall of the abscess. In some instances it has been possible to use marsupialization when the wall is well organized and the lesion is near the surface. However, it has been noted that in general the

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E. S. Gurdjian and J. E. Webster

; by the employment of the Mosher brain drain, a result of World War I experience; by marsupialization or exteriorization; by closed drainage with varying sized rubber tubes; by tapping and finally by total excision after encapsulation. These methods were all conceived prior to the era of penicillin and sulfa drug therapy. They were designed to avoid meningitis which was usually a fatal complication. The use of penicillin in treatment has permitted the host not only to resist infection but help arrest and ultimately irradicate it. Penicillin and sulfa therapy have

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Hugo V. Rizzoli, William S. McCune and Irving J. Sherman

partial motor aphasia had developed. A ventriculogram revealed evidence of a space-occupying lesion in the left frontal lobe. An exploration with a ventricular needle through a burr hole in the left frontal region was performed and a left frontal abscess 1 cm. below the cortex encountered. The abscess was aspirated and beta hemolytic streptococci cultured from the pus. The capsule marsupialized by suturing it to the dura. A penicillin gauze pack was inserted into the abscess cavity and the wound partially closed. Penicillin was continued. On Nov. 7, 1945, he had a

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Lester A. Mount

of the unsuccessful cases the abscess had already ruptured into the ventricle at the time of operation; and in the other, drainage was not adequate by the catheter method and the abscess was treated by marsupialization the day after the catheter method of therapy was attempted. In the 31 cases of brain abscesses treated at the Neurological Institute during the same period, but by other methods, the mortality rate was 45 per cent. The catheter method of treatment affords drainage of the abscess with a minimum amount of cerebral trauma. This is especially valuable

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E. H. Botterell and C. G. Drake

drainage or marsupialization (Cushing 5 ) of the abscess capsule and drainage. Two patients in this early period were treated by radical removal of multiple encapsulated abscesses supported by the use of the antibiotics. The elimination of the septic process resulted in a shorter period of convalescence. As a result of this early experience and the then current reports of Pennybacker, 17 Cawthorne, 4 LeBeau 14 and Fincher 7 the method of radical removal of brain abscess was adopted wherever possible (Botterell 3 ). When a diagnosis of brain abscess has been

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Arthur A. Ward Jr., W. Ross Adey and Karl A. Pribram

marsupial phalanger ordinarily is herbivorous but very savage. After removal of the cortex, one can handle it like a domestic cat, and it is a quite pleasant animal. Likewise, if one removes a comparable area of cortex in the baboon, leaving intact the hippocampus and amygdala, one finds the animal considerably tamed. Postoperatively, these baboons were trained to press a lever for a reward of candy. They were trained further to avoid contact with the lever when a light cue appeared over the lever. The normal animal became extremely frustrated in this situation, whereas

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John A. Jane, David Yashon, William DeMyer and Paul C. Bucy

evolutionary history of the pyramidal system as judged from examination of a marsupial, an insectivore, and various primates. It should be emphasized that the relationships between these groups and the actual antecedents of man is only an approximation. For instance, the marsupials might best be considered as arising independently from the therapsid reptiles rather than bearing any special relation to the eutherian mammals; moreover, the proper systematic position of the tree shrews is by no means settled. 16, 20 However, if we compare the neocortical origin and spinal

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G. Robert Nugent, Philip Sprinkle and Byron M. Bloor

tomogram discloses loss of the floor of the sella turcica and a circumscribed density in the sphenoid sinus. Right: Drawing showing that close examination of the tomogram reveals a thin rim of calcification bulging into the floor of the sella indicating the mass arises in the sphenoid sinus and not the sella itself. Operation One month later the sphenoid sinus was marsupialized through a Ferris-Smith incision and anterior ethmoidectomy. Postoperative course The patient did well, with complete resolution of the eye findings except for diplopia on

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Richard A. Lende, Wolff M. Kirsch and Ralph Druckman

responses on stimulation of the precentral gyrus after removal of the corresponding portion of the adjacent postcentral gyrus. A study by one of us 4 showed an intimacy of sensory and motor function in a single area of somatic representation in marsupials. These observations formed part of the theoretical basis for the performance of the present operations. It has been emphasized by Woolsey 17 that each of the four cortical areas of somatic representation contains both sensory and motor function. On this basis he has proposed the following designations: 1) postcentral

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William I. Silvernail Jr. and Richard B. Brown

. The cyst lining could not be dissected from the cord. It was felt that the cyst should not be allowed to close and reform. Marsupialization was considered and rejected. It was therefore elected to create a fistulous tract using Silastic tubing. It was hoped that dilution and slowing of the mucous secretion would avoid the production of arachnoid adhesions. The mode of formation of an ecto-endodermal adhesion and its differentiation into a neuroenteric band has been graphically demonstrated by McLetchie, et al. 7 An ecto-endodermal adhesion may give rise to