
Ovarian tumor

Ovarian tumors, or ovarian neoplasms, are tumors arising from the ovary. They can be benign or malignant (ovarian cancer). They consists of mainly solid tissue, while ovarian cysts contain fluid.
Histopathologic classification.
Ovarian tumors are classified according to the histology of the tumor, obtained in a pathology report. Histology dictates many aspects of clinical treatment, management, and prognosis. 
The most common forms are:
"Mixed tumors" contain elements of more than one of the above classes of tumor histology.