Roentgen diagnosis of diseases of the head . he skull(through the right foramen parietale) and in the diploe, in thecase of a large tumor of the right cerebral hemisphere which 21In one of the cases demonstrated to us by Barany, there existed a mastoid emis-sary on the right Mile the size of the little linger. From this a very plainly 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 . he skull(through the right foramen parietale) and in the diploe, in thecase of a large tumor of the right cerebral hemisphere which 21In one of the cases demonstrated to us by Barany, there existed a mastoid emis-sary on the right Mile the size of the little linger. From this a very plainly 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 well developed. Eepeatedly have we been struck by the presence of venousconvolutions in the region of the Pacchionian fossas at theoperation or the postmortem of cases with chronic excessiveintracranial pressure or epilepsy. AVe must assume that suchvascular changes, through tension on the dura and erosion ofthe bone, can cause local headache, and, by irritation of thecortex, may cause cerebral On the roentgenogram. Fig. 88.—An x-raj picture of a calvarium with a bilateral erosion produced by spheno-parietal sinuses. the erosions of the inner 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 Leischner, Chirurgie der Hirntomoren, Case 9, and. in addition, Ranzi Wienerklinische Wochcnschrift, 1911, p. 995. 2-V2 ROENTGEN DIAGNOSIS OF DISEASES OF THE HEAD the changes in the venous vessels may be formulated, as T wasthe first to point out, in the following manner: 1. On the roentgenogram the recognizable deepening of thesulci venosi and the Pacchionian fossse, as well a
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