**Core Concept**
Schiller-Duval bodies are a histopathological finding typically associated with embryonal carcinoma, a type of germ cell tumor. They are formed by the invagination of the tumor cells into the lumen of the blood vessel, creating a characteristic appearance.

**Why the Correct Answer is Right**
Schiller-Duval bodies are seen in embryonal carcinoma due to the aggressive nature of this tumor type. The tumor cells exhibit a high degree of cellular proliferation and invasion, which leads to the formation of these distinctive structures. The presence of Schiller-Duval bodies is a key diagnostic feature of embryonal carcinoma, and it is often seen in the context of testicular germ cell tumors.

**Why Each Wrong Option is Incorrect**
**Option A:** Schiller-Duval bodies are not typically associated with seminoma, a different type of germ cell tumor. Seminomas tend to have a more uniform appearance and do not exhibit the characteristic invagination of tumor cells into blood vessels.
**Option B:** Schiller-Duval bodies are not a feature of yolk sac tumors, although both are types of germ cell tumors. Yolk sac tumors are characterized by the presence of Schiller-Duval-like structures, but these are not identical to the Schiller-Duval bodies seen in embryonal carcinoma.
**Option C:** Schiller-Duval bodies are not a feature of teratomas, which are a type of germ cell tumor that contains elements from all three germ layers. Teratomas can exhibit a wide range of histological features, but Schiller-Duval bodies are not typically among them.

**Clinical Pearl / High-Yield Fact**
Schiller-Duval bodies are a critical diagnostic feature of embryonal carcinoma, and their presence should prompt a thorough evaluation for testicular germ cell tumors. The correct identification of these structures can have significant implications for patient care and prognosis.

**Correct Answer:** C.