Which among the following malignancy is MOST SENSITIVE to radiotherapy?

Ans. B. DysgerminomaNormally, dysgerminomas are unilateral. They are considered to be the most common kind of germ cellular tumor found in patients suffering with gonadal dysgenesis. They are highly radiosensitive and chemo-sensitive.Serous cystadenoma: The most common epithelial cell neoplasm. About 70% of these tumors are benign. The treatment of choice in such cases is surgery.Mucinous cystadenoma: Considered to be the second most common epithelial cell tumor of the ovary. Again, surgery being the treatment of choice.Cystic teratoma: Comprises about 60% of all benign ovarian neoplasms and 10-25% of all ovarian neoplasms. Surgical excision is the treatment of choice in such cases.