Painless lump in a 7-year-old's arm

Description: Synovial cell sarcoma is a rare soft-tissue tumor that is unrelated to synovial fluid and can occur in almost any part of the body. The majority of tumors occur in para-articular structures in the extremities;most are localized at diagnosis. These malignant, high-grade, soft-tissue neoplasms account for 7%-8% of all malignant soft-tissue tumors.They are the most common non-rhabdomyosarcoma soft-tissue sarcomas in pediatric patients, representing 5%-10% of all soft-tissue sarcomas.
PAMELA HORN, MSN, CRNP, RNFA