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: Gynaecology & Obstetrics
Leiomyomatosis is 
Select and explain. 
A. Malignant tumor, B. Non-infiltrative tumor, C. Extra uterine tumor, D. uterine fibroid
C: Extra uterine tumor
Answer: C: Extra uterine tumor 
Explanation: Extra-uterine smooth - muscle tumors, Which are benign yet infiltrative, may develop in women with concurrent or prior uterine leiomyoma ⇒ Leiomyomatosis.