This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Psammoma bodies are seen in all of the following malignancies, EXCEPT: 
Select and explain. 
A. Follicular Ca thyroid, B. Papillary Ca thyroid, C. Serous cystadenoma of ovary, D. Meningioma
A: Follicular Ca thyroid
Answer: A: Follicular Ca thyroid 
Explanation: Psammoma bodies are not seen in follicular carcinoma of thyroid. "Psammoma bodies" are laminated calcified spheres and are usually diagnostic of papillary carcinoma. Malignant calcified psammoma bodies are found in 80% of serous cystadenoma of ovary. Meningiomas are also frequently associated with Psammoma bodies. Ref: Wyatt C., Kemp W.L., Moos P.J., Burns D.K., Brown T.G. (2008). Chapter 18. Endocrine Pathology. In C. Wyatt, W.L. Kemp, P.J. Moos, D.K. Burns, T.G. Brown (Eds), Pathology: The Big Picture.