<prompt> The most probable diagnosis in the below specimen in a 20 year old female with mass abdomen, on removal of ovary shown belowChoriocarcinomaDysgerminomaEmbryonal cell tumorMalignant teratoma  <response>: Dysgerminoma:It is the most common pure germ cell tumor of ovary.Its solid, firm and non-cystic solid tumor of young first differential is dysgerminomaIt corresponds to Seminoma.It is common under the age of 20.It is usually unilateral.It is neutral.It secrets placental alkaline phosphatase.It may be associated is hypoplasia or aplasia of part of genital tract.It is very radiosensitive.It is potentially malignant with malignancy rate of 30-50.Endodermal sinusyolk sac tumor is 2nd most common germ cell tumor. 