This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metastatic Bone Disease, Subject name: Orthopaedics
Most common soft tissue tumor in a child: 
Select and explain. 
A. Rhabdomyosarcoma, B. Histiocytoma, C. Fibrosarcoma, D. Liposarcoma
A: Rhabdomyosarcoma
Answer: A: Rhabdomyosarcoma 
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%).