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
[{'content': 'Sections from a solid-cystic unilateral ovarian tumor in a 30-year old female show a tumor composed of diffuse sheets of small cells with doubtful nuclear grooving and scanty cytoplasm. No Call-Exner bodies are seen.The ideal immunohistochemistry panel would include - \nSelect and explain. \nA. Vimentin, epithelial membrane antigen, inhibin, CD99, B. Desmin, S-100 protein, smooth muscle antigen, cytokeratin, C. Chromogranin, CD45, CD99, CD20, D. CD3, chromagranin, CD 45, synaptophysin', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Vimentin, epithelial membrane antigen, inhibin, CD99This patient is having granulosa cell tumor of ovary which is chracterized histologically by :(i) Diffuse sheets of round and oval cells (ii) Inconspicuous groove and folds in nuclei - coffee bean appearance(iii) Scant cytoplasmo Granulosa cell tumor is positive for --> (i) Vimentin, (ii) Inhibin, (iii) CD99o Epithelial membrane antigen is positive in surface epithelial tumor.So, a option a is the best, and markers given in this option will help to make the diagnosis of granulosa cell tumor.", 'role': 'assistant'}]