The symptoms of cerebral neoplasm may be so closely paralleled by other diseases as to make the differentiation very difficult until opportunity has been had for protracted observation and study. Chronic nephritis, for example, may cause all the symptoms of brain tumor. I have seen two such cases recently, and one of them presented so much difficulty of diagnosis that it seems to me desirable to record it.
The patient was an Irishman, aged 57, married, employed as a watchman. The symptoms for which he sought relief had existed about a year. The initial symptom was headache; the pain was principally in the left temporofrontal region. He attributed the pain to an injury which he experienced three years before when he had been knocked down by a bicycle, and had received a wound over the left eye which required nine stitches. Since that time there had always been sensitiveness over