## **Core Concept**
The question tests understanding of the complications associated with ovarian tumors, specifically the risk factor for ovarian torsion. Ovarian torsion is a serious complication where the ovary twists around its ligamentous supports, cutting off its blood supply.
## **Why the Correct Answer is Right**
The correct answer, pedunculated ovarian tumors (or cysts), are more prone to torsion because they have a stalk (peduncle) that can twist. This twisting can lead to ischemia and necrosis of the ovary if not promptly treated. The stalk acts as a lever, increasing the likelihood of torsion compared to sessile or broad-based tumors.
## **Why Each Wrong Option is Incorrect**
- **Option A:** A sessile ovarian tumor is less likely to cause torsion because it does not have a stalk that can twist; it is more attached to the ovary or surrounding structures.
- **Option B:** A non-pedunculated or broad-based ovarian tumor does not have the stalk necessary for easy twisting.
- **Option C:** While large size can contribute to the risk of torsion, it is not the specific characteristic mentioned that directly causes torsion; size can make any tumor more noticeable and risky but does not directly imply a stalk.
## **Clinical Pearl / High-Yield Fact**
A key clinical point is that ovarian torsion is an emergency and requires prompt surgical intervention to salvage the ovary. It often presents with acute abdominal pain and may be associated with nausea and vomiting. A history of ovarian cysts or tumors increases the risk.