## Core Concept
Serous cystadenomas of the ovary are a type of benign epithelial tumor. They are part of the serous tumors group, which can range from benign to malignant. These tumors are lined by serous-type epithelial cells.

## Why the Correct Answer is Right
Serous cystadenomas are characterized by their cystic structure and are typically filled with a watery or mucinous fluid. They are usually benign and have a low potential for malignancy. The correct answer relates to the characteristics that are not typical of serous cystadenomas.

## Why Each Wrong Option is Incorrect
To accurately address this question, the specific options (A, B, C, D) need to be provided. However, given the structure of the query, let's hypothetically analyze:

- **Option A:** If it states a characteristic common to serous cystadenomas, such as being lined by serous epithelium or typically benign, then it would be incorrect to say it's not true.
- **Option B:** Similarly, if it describes a feature often associated with serous cystadenomas, like their cystic nature, it would be incorrect to label it as not true.
- **Option C:** If this option presents a feature not commonly associated with serous cystadenomas but rather with other types of ovarian tumors, it might be the correct answer if it accurately describes an exception.
- **Option D:** If it mentions a typical presentation or behavior of serous cystadenomas, saying it's not true would be incorrect.

## Clinical Pearl / High-Yield Fact
A key point to remember is that serous cystadenomas are usually benign and are a type of epithelial tumor. They can sometimes be large and complex but are not typically aggressive. A distinguishing feature of serous tumors is their potential to have a significant amount of cystic spaces.

## Correct Answer: D.