<prompt> In a case of Dysgerminoma of ovary one of the following tumor markers is likely to be raised.Serum HCG.Serum alphafetoprotein.Serum lactic dehydrogenase.Serum inhibin.  <response>: Placental alkaline phosphatase PLAP and lactate dehydrogenase LDH are produced by up to 95 of dysgerminomas, and serial measurements of LDH may be useful for monitoring the disease. A karyotype should be obtained preoperatively for all premenarcheal girls, paicularly those with dysgerminomas, because of the propensity of these tumors to arise in dysgenetic gonads 