<prompt> Answer this question truthfullyWhich type of tumor is characterized as epithelial-stromal on the surface?  <response>: <reason> The diagnosis of surface epithelial-stromal tumor when the following diagnostic criteria are met: Imaging findings compatible with ovarian mass. Elevated levels of CA-125 Present clinical criteria Increased abdominal distensionSurface epithelial-stromal tumor is usually asymptomatic. Symptoms of surface epithelial-stromal tumor may include the following: Abdominal pain Dyspareunia Nausea VomitingPatients with surface epithelial-stromal tumor usually are well-appearing. Pelvic and abdominal examination may be remarkable for: Increased abdominal distension Wave sign ascities Decreased breath soundsLaboratory findings consistent with the diagnosis of surface epithelial-stromal tumor, include: Elevated CA-125 level Often unspecific Useful for treatment responsePelvic transabdominaltransvaginal ultrasound with or without Doppler is the initial imaging method of choice for surface epithelial-stromal tumor. Enhanced CT is the imaging modality of choice for surface epithelial-stromal tumor. On ultrasound, findings of surface epithelial-stromal tumor, include: Hypoechoichyperechoic solid mass CalcificationOn CT, findings of surface epithelial-stromal tumor, include:Calcifications Solid component may show mild to moderate enhancement post contrast. Large massOn MRI, findings of surface epithelial-stromal tumor, includeHypointense on T2 weighted sequences 