Table 1.

Definition of dominant/non-dominant tumour mass [20]

Dominant tumour mass	Non-dominant tumour mass
Limited to one ovary	Tumour was classified as primary peritoneal cancer
Tumour mass was found in one ovary, with only tumour foci on the other ovary	Only tumour foci were found on both ovaries, no ovaries could be identified on either side of the peritoneal cavity
Tumour dimensions, area, or volume on one side was at least twice that of the other side	Tumour dimensions, area, or volume on one side was within two times that of the other side