抄録
Histological findings of neuroblastic tumors of 313 patients who had no treatment before surgery were compared with their results. They were divided into 5 groups by the distribution of the neuroblastic cells and mitotic rates. Well differentiated type, intermixed type(tumor of fully differentiated ganglioneuromatous tissue with presence of multiple microscopic foci of neuroblastic cell nests), and diffuse neuroblastic type with a small number of mitotic cells(less than 200 of 5,000 tumor cells) are apparently have better prognosis than focal nodular type(discrete nodules of immature cells with capsular structure which are seen in gross findings in ganglioneuromatous tissue), or other diffuse type.
