**Core Concept**
Hurthle cells are a type of oncocyte found in the thyroid gland, characterized by their large size, abundant eosinophilic cytoplasm, and distinct cell membrane. These cells are often associated with follicular thyroid neoplasms, particularly Hurthle cell carcinoma.

**Why the Correct Answer is Right**
Hurthle cells are a specific type of cell found in the thyroid gland, and their presence is often associated with follicular thyroid neoplasms. The mechanism behind Hurthle cell formation is not fully understood, but it is believed to involve genetic mutations that lead to the accumulation of oncogenic proteins. Hurthle cells are often seen in the context of Hashimoto thyroiditis, a chronic autoimmune thyroiditis.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because Hurthle cells are not typically associated with papillary thyroid carcinoma, which is characterized by a different type of cell morphology.
**Option B:** This option is incorrect because Hurthle cells are not typically seen in medullary thyroid carcinoma, which originates from the parafollicular cells of the thyroid gland.
**Option C:** This option is incorrect because Hurthle cells are not typically associated with anaplastic thyroid carcinoma, which is characterized by a highly aggressive and undifferentiated cell morphology.

**Clinical Pearl / High-Yield Fact**
Hurthle cell carcinoma is a type of follicular thyroid neoplasm that is often associated with a worse prognosis than other types of thyroid cancer. It is essential for clinicians to accurately diagnose Hurthle cell carcinoma to provide appropriate treatment and management.

**Correct Answer: D. Hurthle cell carcinoma**