international neuroblastoma pathology classification: unfavorable histology group, patient 5 years or older, with any subtype of neuroblastoma (schwannian stroma-poor) and any mitosis-karyorrhexis index
finding of lesion
international neuroblastoma pathology classification: unfavorable histology group, patient of any age, with undifferentiated neuroblastoma (schwannian stroma-poor) and any mitosis-karyorrhexis index