This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
All of the following soft tissue sarcoma has propensity for lymphatic spread except 
Select and explain. 
A. Neurofibrosarcoma, B. Synol sarcoma, C. Rhabdomyosarcoma, D. Epitheloid sarcoma
A: Neurofibrosarcoma
Answer: A: Neurofibrosarcoma 
Explanation: Ans. is 'a' i.e., Neurofibrosarcoma Soft tissue sarcomas are tumors of mesenchymal origin. Unlike most carcinomas, soft tissue sarcomas rarely metastasize to the lymph nodes (<5%); therefore lymph node surgery usually is not necessary.