there are four histogenetic categories of primary ovarian tumours : neoplasms of germ cell origin , neoplasms of celomic ( germinal ) epithelium and its derivatives , neoplasms of specialized gonadal stroma ( sex cords and mesenchyme ) , and neoplasms of non-specialized gonadal stromal and heterotopic elements .
C0205851
neoplasms of
C0027651
neoplasms