Papanikolaou test or Papanicolaou test does not always show that the person is having an ovarian cancer. It is also used to diagnose premalignant(pre-cancer) problems in endo and ectocervix.
A pap test does not reveal ovarian cancer. Check out the symptoms of ovarian cancer which is the biggest killer of the female cancers. One in fifty women get it and many do not know the symptoms.
There is not an specific exam that can diagnose ovarie cancer but there is an blood test that can be used inwhich will elevate with the presents of any cancer within the reproduction cavity.