Synovial sarcoma of the extremities: prognostic factors for 20 nonmetastatic cases and a new histologic grading system with prognostic significance - Baptista, André Mathias; Almeida, Paulo Guilherme de; Camargo, Olavo Pires de; Croci, Alberto Tesconi; Oliveira, Claudia Regina G. C. M. de; Azevedo Neto, Raymundo Soares de; Giannotti, Marcelo Abrantes; Caiero, Marcelo Tadeu; Santos, Telma Murias dos; Abadi, Márcia Datz (2006)