I can explain terminology to you,,,r/o
cancer means rule out
cancer.,,do not let that scare you they rule out
cancer for everything. Your ovaries are free and clear..one mass sounds to be uterine,,a Mass is simply a "group" term used loosley for any lump or bump that they dont kno what it is,,,could be's cyst, polyp, endometrial tissue, aneometrial tissue (all begnine) some very very rare cyst can be malignant,,If you had a malignancy your white count should be HIGH ..