international neuroblastoma pathology classification: unfavorable histology group, patient of any age, with undifferentiated neuroblastoma (schwannian stroma-poor) and any mitosis-karyorrhexis index
international neuroblastoma pathology classification: unfavorable histology group, patient of any age, with ganglioneuroblastoma, nodular (composite schwannian stroma-rich/stroma-dominant and stroma-poor)