Most common fibroid associated with malignancy is :
**Core Concept**
The question is testing the association between uterine fibroids (leiomyomas) and malignancy, specifically the type of fibroid that has a higher risk of transformation into a leiomyosarcoma, a rare but aggressive uterine cancer.
**Why the Correct Answer is Right**
The correct answer is **C.** **Pedunculated submucosal fibroid**. This type of fibroid is more likely to be associated with malignancy due to its location and growth pattern. Submucosal fibroids grow into the uterine cavity and are more likely to be pedunculated, meaning they have a stalk-like attachment to the uterine wall. This type of growth pattern increases the risk of malignant transformation.
* **Option A:** **Intramural fibroid** is not typically associated with malignancy, as it grows within the uterine wall and is less likely to be pedunculated.
* **Option B:** **Subserosal fibroid** is located on the outer surface of the uterus and is also less likely to be associated with malignancy than a pedunculated submucosal fibroid.
**Clinical Pearl / High-Yield Fact**
It's essential to note that while the risk of malignancy is higher in pedunculated submucosal fibroids, the overall risk is still relatively low. However, any fibroid with a high risk of malignancy should be closely monitored and surgically removed if necessary.
**Correct Answer:** **C. Pedunculated submucosal fibroid**