Surface epithelial-stromal tumor must be differentiated from other diseases that cause abdominal distension, pelvic or abdominal pain, and nausea, such as:  
Ovarian dysgerminoma Ovarian yolk sac tumor Ovarian embryonal carcinoma
What does the term surface epithelial-stromal tumor mean?
<s>[INST] Answer the question truthfully, you are a medical professional. This is the question: What does the term surface epithelial-stromal tumor mean? [/INST] \n Surface epithelial-stromal tumor must be differentiated from other diseases that cause abdominal distension, pelvic or abdominal pain, and nausea, such as:  
Ovarian dysgerminoma Ovarian yolk sac tumor Ovarian embryonal carcinoma</s>