**Core Concept**
Hurthle cells are a type of oncocyte, which is an epithelial cell that has undergone neoplastic transformation. They are characterized by their large size, abundant cytoplasm, and distinctive nuclear features.

**Why the Correct Answer is Right**
Hurthle cells are typically found in the thyroid gland, particularly in papillary thyroid carcinomas. They are thought to arise from the follicular epithelium of the thyroid gland and contain abundant mitochondria, which give them a distinctive appearance. The exact pathogenesis of Hurthle cells is not fully understood, but they are believed to result from a combination of genetic and environmental factors.

**Why Each Wrong Option is Incorrect**
**Option A:** Hurthle cells are not typically found in the adrenal gland, which is the primary site of other types of oncocytes, such as pheochromocytomas.
**Option B:** Hurthle cells are not associated with the salivary gland, which is a different type of epithelial tissue.
**Option C:** Hurthle cells are not found in the skin, where other types of epithelial tumors, such as squamous cell carcinomas, are more common.

**Clinical Pearl / High-Yield Fact**
Hurthle cells are a classic example of a "collision tumor," where two different types of cells coexist in the same tumor. This can be an important diagnostic clue, as it may suggest a complex pathogenesis.

**Correct Answer:** C.