Local venous invasion of synovial sarcoma in the upper extremity: a case report. - Choi, Jun Ho; Na, Heui Ro; Kim, Dong Wan; Lee, Ho Jun; Kim, Kwang Seog; Choi, Yoo Duk; Kim, Seung Hyun; Hwang, Jae Ha (Archives of Hand & Microsurgery, 2026)