## **Core Concept**
Psammoma bodies are concentrically laminated, calcified deposits often found in certain types of tumors. They are a type of dystrophic calcification and are particularly associated with neoplastic and inflammatory conditions. The presence of psammoma bodies can be a diagnostic clue in pathology.

## **Why the Correct Answer is Right**
Psammoma bodies are characteristically found in papillary thyroid carcinoma, meningiomas, and serous papillary ovarian cystadenocarcinomas. They are also seen in other conditions such as psammomatous melanocytic nevi and certain types of inflammatory lesions. The correct answer likely relates to a condition where psammoma bodies are not typically found.

## **Why Each Wrong Option is Incorrect**
- **Option A:** Typically associated with psammoma bodies; for example, papillary thyroid carcinoma is known for these structures.
- **Option B:** Also associated with psammoma bodies; meningiomas frequently contain them.
- **Option C:** Similarly associated; psammoma bodies are often seen in serous papillary ovarian cystadenocarcinomas.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that the presence of psammoma bodies in a thyroid fine-needle aspiration biopsy is highly suggestive of papillary thyroid carcinoma. This is a high-yield fact for exams and clinical practice, as it directly influences diagnostic workup and management.

## **Correct Answer:** D.