**Psammoma Bodies**

**Core Concept**
Psammoma bodies are small, round, laminated calcifications found in various types of tumors and other pathological conditions. They are typically seen as a result of the deposition of calcium salts in areas of tissue damage or degeneration.

**Why the Correct Answer is Right**
Psammoma bodies are classically associated with papillary thyroid carcinoma, serous ovarian cystadenocarcinoma, and meningiomas. These structures are formed through the calcification of cellular debris and are often seen as a diagnostic feature of these tumors. The presence of psammoma bodies in these contexts can help pathologists and clinicians make an accurate diagnosis.

**Why Each Wrong Option is Incorrect**
**Option A:** Papillary thyroid carcinoma is actually a correct association, so this option is incorrect.
**Option B:** Serous ovarian cystadenocarcinoma is also a correct association, making this option incorrect.
**Option C:** Meningiomas are a correct association, so this option is incorrect.

**Clinical Pearl / High-Yield Fact**
Psammoma bodies are a classic example of a "tumor marker" in pathology, helping clinicians to diagnose and differentiate between various types of tumors.

**Correct Answer: D.**