What unique structure is characteristic of Yolk Sac Tumors?

Yolk Sac Tumors, also known as endodermal sinus tumors, are distinctive for the presence of Schiller-Duval bodies. These structures are histological formations that resemble glomeruli and consist of a central blood vessel surrounded by a layer of epithelial cells. The presence of Schiller-Duval bodies is considered pathognomonic for yolk sac tumors, aiding in the diagnosis and differentiation from other germ cell tumors.

Other structures, such as glomeruloid structures, keratinizing squamous cells, or giant cell formations, are not specific to yolk sac tumors and are typically associated with different types of tumors or pathological conditions. Recognizing Schiller-Duval bodies as the hallmark of yolk sac tumors is crucial for pathology assistants, as it assists in accurate identification and diagnosis of these tumors.