Tumors of the cerebellum / by Charles K. Mills [and others].

Date:
1905
Catalogue details

Licence: In copyright

Credit: Tumors of the cerebellum / by Charles K. Mills [and others]. Source: Wellcome Collection.

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    182 served as a rare symptom of tumor of the middle peduncle of the cerebellum. Nystagmus is almost always present in cerebellar tumors. It may be rotary or vertical, but is most frequently lateral. Sometimes it is not observable when the gaze is directed forward but develops at once in right or left levoversion. It would seem also that in a certain number of cases the nystagmus is evident only when the eyes are turned toward the side on which the tumor is situated, and, indeed, that such nystagmus may be the sole ocular sign of the cerebellar growth. For example, Pineles'! observed in a patient with normal eyegrounds nystagmus only when the eyes were directed to the left. Post mortem examination re- vealed a walnut sized tubercle in the left cerebellar hemisphere, the middle of the lobus quadrangularis being also involved. This development of nystag- mus when the eyes are rotated toward the side of the tumor has been commented upon by a number of observers. It has been noticed by Mills, Spiller, and by myself in several cases which we have exam- ined together. In place of a true nystagmus, a nystagmoid movement is often observable when the eyes are turned from side to side, particularly if there is an associated paralysis of the external rec- tus. There is no doubt that nystagmus may be