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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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Which of the following is the most common malignant ovarian tumor?
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The correct answer is  Ans. is 'a' i.e., Serous cystadenocarcinoma o Serous cysadenomas or cysadenocarcinomas form about 50% of all the ovarian tumors. Of these 60 - 70 % are benign, 15% borderline malignant, and 20 - 25% malignant. Thus serous cystadenocarcinomas form the most common malignant tumors of ovary.