The MRI features of a unilocular ovarian cyst of homogeneous fluid content with no restricted diffusion, internal septation or solid component in a postmenopausal woman are highly suggestive of a serous inclusion cyst.

In such case ( ovarian cyst >5 cm), the recommendation is follow-up either in 3-6 months for resolution/re-characterization or in 6-12 months for growth rate assessment.

For more details regarding the recommendation of an ovarian cyst in postmenopausal women, please refer to the article: ovarian cyst.