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This monograph is a scholarly and complete compilation of the literature on tumors of the fourth ventricle, together with the histories in twenty-five cases in which autopsy was performed. It is more a reference work than an original contribution, and indeed few facts are brought forward which are not familiar to most neurologists. Much space is given to a review of the work of Cushing and his associates, which has drawn particular attention to the subject of tumors in the posterior fossa in the United States.
A tumor should be suspected when a patient under 20 years of age presents symptoms of increased intracranial pressure, and especially vomiting, vertigo and difficulty in walking. In young patients papilledema may be absent, but hydrocephalus may often be demonstrated by roentgen examination. Abnormal attitudes of the head are also suggestive, and tonic fits are extremely characteristic. There are, of course, cerebellar manifestations and