. Roentgen diagnosis of diseases of the head . kull(through the right foramen parietale) and in the diploe, in thecase of a large tumor of the right cere])ral hemisphere Avhich =In one of the cases demonstrated to us by Barany, there existed a mastoid emis-sary on the right side, the size of the Httle finger. From this a very ],lainly visible andpalpable vein made its exit, pulsating synchronously with the systole. INTRACRANIAL DISEASES 231 had eroded the inner surface of the skull. Smith referred to thefact that, in the people of the Balkan peninsula, the retrobreg-matic Pacchionian grooves a
. Roentgen diagnosis of diseases of the head . kull(through the right foramen parietale) and in the diploe, in thecase of a large tumor of the right cere])ral hemisphere Avhich =In one of the cases demonstrated to us by Barany, there existed a mastoid emis-sary on the right side, the size of the Httle finger. From this a very ],lainly visible andpalpable vein made its exit, pulsating synchronously with the systole. INTRACRANIAL DISEASES 231 had eroded the inner surface of the skull. Smith referred to thefact that, in the people of the Balkan peninsula, the retrobreg-matic Pacchionian grooves are especially Avell developed. Eepeatedly have we l)een struck by the presence of venousconvolutions in the region of the Pacchionian fossae at theoperation or the postmortem of cases with chronic excessiveintracranial pressure or epilepsy. We must assume that suchvascular changes, through tension on the dura and erosion ofthe bone, can cause local headache, and, l^y irritation of thecortex, may cause cerebral symptoms.^- On the roentgenogram. Fig. 88.—An x-ray picturs of a calvarium with a bilateral erosion produced by spheno-parietal sinuses. the erosions of the innei surface of the skull, produced by thesevessels, appear as sharply outlined, bright areas lying in theparietal region near the middle line, and from these brightplaces run short varicose venous canals. In conclusion one recognizes on the roentgenogram, withoutdifficulty, the changes in the number, breadth, direction ofcourse and the locality of the venous canals of Breschet. The diagnostic significance of the roentgenologic proof of =-See , Chirurgic der Hirntomorcn, Case 9, and, in addition, Kanzi IVicncrklinischc Wochcnschvift, 1911, p. 995. 232 KOENTGEN DIAGNOSIS OF DISEASES OF THE HEAD the changes in the venous vessels may be formulated, as I Avasthe first to point out, in the folloAving manner: 1. On the roentgenogram the recognizable deepening of thesulci venosi and the Pacchionian fossae, as we
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