Lymph node metastases in paediatric and young adult patients with non-rhabdomyosarcoma soft tissue sarcoma (NRSTS): Findings from Children's Oncology Group (COG) study ARST0332

•Large prospective study of NRSTS with lymph node (LN) involvement in young patients.•Occult lymph node involvement is exceedingly rare.•Isolated LN metastases have a favourable prognosis so should be treated aggressively.•Complete enlarged LN excision and nodal bed radiation correlate with better outcome.