You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Which of the following tumor contain the characteristic 'Schiller Duval Bodies'? and explain in detail?
Yolk Sac Tumor (Endodermal Sinus Tumor) is a germ cell tumor. Most common symptom is bloody vaginal discharge. Grossly, this tumor appears polypoid or sessile and often ulcerated. On microscopic examination, these tumors most commonly have a reticular pattern. A classic finding, although not always present, is the Schiller-Duval body. This is a papilla with a single central vessel. Serum alpha-fetoprotein (AFP) is a useful tumor marker for yolk sac tumor. Ref: Hoffman B.L., Schorge J.O., Schaffer J.I., Halvorson L.M., Bradshaw K.D., Cunningham F.G., Calver L.E. (2012). Chapter 32. Vaginal Cancer. In B.L. Hoffman, J.O. Schorge, J.I. Schaffer, L.M. Halvorson, K.D. Bradshaw, F.G. Cunningham, L.E. Calver (Eds), Williams Gynecology, 2e.