Orthopaedics Metastatic Bone Disease 2038e781 Most common soft tissue tumor in a child: A Rhabdomyosarcoma B Histiocytoma C Fibrosarcoma D Liposarcoma High-Yield Explanation (a) Rhabdomyosarcoma- Rhabdomyosarcoma, the most common childhood soft-tissue sarcoma, is often located in the head and neck (40%) and in the trunk and extremities (25%).