international neuroblastoma pathology classification: favorable histology group, patient age 1.5 years up to but less than 5 years, with differentiating neuroblastoma (schwannian stroma-poor), and low mitosis-karyorrhexis index
tumor finding
international neuroblastoma pathology classification: unfavorable histology group, patient of any age, with ganglioneuroblastoma, nodular (composite schwannian stroma-rich/stroma-dominant and stroma-poor)