This report is based on a review of the clinical records in 41 cases of intraspinal tumor in which the patients were less than 15 years of age. The patients in these cases were observed at the Mayo Clinic in the 20 year period of 1930 to 1949, inclusive. In this paper, the term children is used to designate patients who are less than 15 years of age.
Table 1 gives a classification of these tumors and the relative incidence of the various types in these cases. The figure shows the site of the tumors. Of the 41 patients, 18 were boys and 23 were girls. Table 2 shows the distribution of patients according to age.
PRIMARY TUMORS OF THE SPINAL CORD AND ITS ENVELOPES
In the majority of cases of intraspinal tumor in which the patients are children, the neoplasm arises from the spinal cord or its envelopes. In