This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: miscellaneous, Subject name: Pathology
The risk of sarcoma developing in a fibroid uterus is approximately 
Select and explain. 
A. <1%, B. <10%, C. >30%, D. >50%
A: <1%
Answer: A: <1% 
Explanation: Though uterine sarcoma is rare--with the annual incidence of leiomyosarcomas at approximately 0.4 to 0.64 per 100,000 women--it has been estimated that approximately 1:8300 to 1:352 women undergoinguterine surgery for presumedfibroids have unsuspected sarcoma.