Serous inclusion cyst of the ovary

Case contributed by Ammar Haouimi
Diagnosis probable

Presentation

Incidental finding on ultrasound exam (not shown).

Patient Data

Age: 70 years
Gender: Female

A well-defined thin-walled right ovarian unilocular cyst (4.5 cm) with a homogeneous fluid content of a low signal on T1 and high signal on T2 with no restricted diffusion or enhancement on postcontrast sequences. No internal septation or solid component is seen.

Case Discussion

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 (cyst >3 to ≤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, but no follow-up is needed if the cyst is exceptionally well-visualized/characterized and documented with confidence by the imager.

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

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