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ticular capsula interna are not touched by the tumor and have been pushed ~ 
frontalward and downward. : 
Section 3. It strikes to the right the distal ending of the pulvinar. The left thala- 
mus is enlarged by the tumour in all directions. The tumour has here taken the 
place of the pulvinar thalami, destroying at the same time its ventral nuclei 
with the radiations of the lemniscus entering these nuclei at their ventral surface, 
and the c. geniculatum internum. 
The c. gen. laterale is found to be removed sideward, but otherwise intact. 
The cells are arranged in it in the ordinary manner, and the intact radiations of 
the triangular field of WerNICKE (section 2) originate in this intact ganglion (as 
may be seen in sections between 2 and 3). 
In the retro-lenticular capsula interna however an extensive degeneration of 
fibres towards the parietal gyri is found. 
The corp. quadr. anticum has been pushed aside, without being destroyed by 
the tumour. The tumour pushes aside the radiation from the tractus to this 
ganglion, but, as is made evident by sections between 3 and 4 the c. quadr. anti- 
cum is not infiltrated, although a few fibres in its superficial medullar-layer have 
degenerated. 
Section 4. Ic strikes the left hemisphere a little before the splenium corporis 
callosi. The enormous pulvinar, entirely substituted by the tumour, has pushed 
aside the splenium and the lateral ventricle without injuring their tissues. The 
tumour has grown together with the posterior portion of the Cornu Ammonis, and 
is lying therefore, covered by the alveus, witbin the wall of the ventricle. 
Section 5. It strikes the. distal end of the tumor. Grown together with the 
Cornu Ammonis the tumour compresses the ventricle, without injuring ils wall. 
Section 6. It strikes the occipital lobe circa 1 c.M. distalward from the tumour. 
After comparing these different sections, we are justified in assuming 
that a tumour, originating in the left pulvinar thalami, growing ts 
distalward, has compressed the posterior horn of the lateral ventricle, 
is destroying frontalward the ventraland medial nuclei of the thalamus, 
and is threatening finally the capsula interna, situated more frontally. 
The corpus geniculatum laterale and the jibres passing through 
the triangular area of WeRNEeKE, however are almost completely 
intact, as ús likewise the corp. quadrigeminum anticum. 
In the retro-lenticular region of the capsula interna there are 
degenerate fibres, part of which pass thence into the strata sagittalia, 
whilst another part goes directly in the corona radiata of the lower 
parietal brain, towards the gyrus supra-marginalis (fig. 3, 4, 5). 
In the stratum sagittale internum a mass of degenerate fibres is 
lying laterally from the ventricle and passing gradually through the 
stratum sagittale externum they enter into the medullary cones of 
the gyrus angularis and of the basal occipital convolutions. 
Remarkable is the aspect of the medullary cones (see section 6) 
of the circonvolutions around the fissura calearina. They appear as 
solid black fascicles. 
