text: Histology of the excised<unk>  after surgery is the gold standard test for the diagnosis of ovarian<unk> <unk><unk> s. Surgery must be performed when the patient presents with an adnexal mass in the abdominal/pelvic exam and elevated serum concentration of associated<unk>  markers. Mature teratoma may be diagnosed using ultrasonographic imaging. However, the<unk>  should be removed surgically.
option_0: Ovarian germ cell tumor diagnostic study of choice
option_1: Sexcord/ stromal ovarian tumors diagnostic study of choice
option_2: Epithelial ovarian tumors diagnostic study of choice
option_3: Gonadoblastoma differential diagnosis
option_4: Sacrococcygeal teratoma diagnostic study of choice
option_5: Sexcord/ stromal ovarian tumors other imaging findings
option_6: Adrenolipoma other diagnostic studies
option_7: Seminoma other diagnostic studies