Case contributed by Dr Mostafa El-Feky


Periodic pelvic pain

Patient Data

Age: 40 years
Gender: Female

A left ovarian homogeneous rounded lesion with smooth outline, suggestive of left ovarian cyst.

A left-sided ovarian cyst is noted 5 cm in average diameter, with focal dependent eccentric dark T2 nodule. It shows T1 hyperintensity not suppressed on fat sat, with T2 shading. It shows a thin wall with mild enhancement and no mural soft tissue component. No diffusion restriction.

Case Discussion

MRI features are consistent with left-sided endometriotic (chocolate) cyst. T2 dark spot sign is demonstrated,  which indicates chronic hemorrhage, differentiating endometriotic cyst from a functional hemorrhagic ovarian cyst, as both show high T1 signal with T2 shading

How to use cases

You can use Radiopaedia cases in a variety of ways to help you learn and teach.

Creating your own cases is easy.

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.