## **Core Concept**
Masculinizing tumors of the ovary are those that produce androgens, leading to virilization in females. These tumors can arise from various cell types within the ovary, including stromal cells. The most common types are those that produce androgens directly or stimulate the production of androgens.

## **Why the Correct Answer is Right**
The correct answer, ** Sertoli-Leydig cell tumors (also known as androblastomas)**, are a type of sex cord-stromal tumor that can cause masculinization. These tumors contain Leydig cells, which are known to produce androgens. The presence of these cells leads to increased androgen production, causing virilization in females. This type of tumor is known for its ability to cause significant virilization, including hirsutism, deepening of the voice, and clitoral enlargement.

## **Why Each Wrong Option is Incorrect**
- **Option A:** While granulosa cell tumors are a type of sex cord-stromal tumor, they are typically estrogen-producing and can lead to feminization rather than masculinization.
- **Option B:** Thecomas are also sex cord-stromal tumors that usually produce estrogen, leading to endometrial hyperplasia and other estrogen-related symptoms, not masculinization.
- **Option D:** Although some ovarian tumors can produce a variety of hormones, the specific combination listed here does not accurately represent the most common masculinizing tumors of the ovary.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that **Sertoli-Leydig cell tumors** are rare but can cause significant virilization. They are often diagnosed in younger women and can be associated with a poor prognosis if not caught early. A high-yield fact for exams is to remember that virilizing ovarian tumors are less common than granulosa cell tumors but can have a significant impact on a patient's quality of life due to virilization.

## **Correct Answer:** . Sertoli-Leydig cell tumors.