Treatment at relapse for synovial sarcoma of children and adolescents: A multi-institutional European retrospective analysis.

Purpose: Though the prognosis for pediatric patients with localised synovial sarcoma (SS) is generally good, the chances of being cured after relapse are limited. This study describes a retrospective multi-institutional series of relapsing SS patients treated at six selected European referral centers for pediatric sarcoma.

Patients And Methods: The study included 41 patients <21 years with relapsing SS, treated between 2002 and 2022.