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
international neuroblastoma pathology classification: favorable histology group, patient of any age with ganglioneuroma (schwannian stroma-dominant) maturing, or mature