Journal of Clinical Oncology, Vol 12, 2360-2366, Copyright © 1994 by American Society of Clinical Oncology
Synovial sarcoma in children and adolescents: the St Jude Children's Research Hospital experience
AS Pappo, J Fontanesi, X Luo, BN Rao, DM Parham, C Hurwitz, L Avery and CB Pratt
Department of Hematology-Oncology, St Jude Children's Research Hospital, Memphis, TN 38101-0318.
PURPOSE AND METHODS: We reviewed the clinical records and pathologic
findings of 37 children and adolescents with synovial sarcoma treated at
our institution over a 30-year period to evaluate the prognostic
significance of tumor size, invasiveness, histology, and other features.
RESULTS: The 20 male and 17 female patients with synovial sarcoma had a
median age of 13.7 years at diagnosis. Primary tumor sites were the
extremities (n = 27), trunk (n = 8), and head and neck (n = 2). Disease
stage (clinical group) was as follows: group I, n = 21; group II, n = 7;
group III, n = 4; and group IV, n = 5. Nineteen patients had invasive (T2)
lesions, 20 had tumors more than 5 cm in diameter, and 14 had histologic
grade 3 lesions. The estimated 5-year survival rate (+/- SE) for patients
with group I or II disease was 80% +/- 9%, compared with 17% +/- 15% for
those with group III or IV tumors (P = .0003). An exact log-rank test,
adjusted for clinical group, showed that tumor invasiveness and grade
independently predicted overall and progression-free survival (P < .05);
tumor size was significantly correlated with progression-free survival. A
borderline significant relationship with overall survival was found for
both tumor size and histologic subtype (P = .09). CONCLUSION: A controlled
trial of adjuvant chemotherapy is merited in children with resected
synovial sarcoma (clinical group I or II) who present with unfavorable
clinicopathologic features such as large, invasive, or grade 3 lesions.
Children with unresected or metastatic disease fare poorly despite
multimodality therapy and require novel treatment approaches.