Chronic intermittent pelvic pain. Dysmenorrhea .
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Right ovary appears bulky with a posterior cystic lesion that appears hyperintense on T1 and intermediate on T2 (shading sign). No signal intensity loss noted on T1 fat sat images. Variable restriction is seen on DWI/ADC images. These features suggest an endometriotic cyst.
Another small adjacent cyst is seen, appearing subtly hyperintense on T1 and hyperintense on T2. Signal intensity loss noted on T1 fat sat images. No restriction on DWI/ADC iamges. These features suggest an haemorrhagic ovarian cyst.
Also the anterior most cyst is a follicular ovarian cyst.
The uterus, endometrium and left ovary shows normal imaging features.
This patient was a known case of endometriotic cyst on follow up.
Special thanks: Dr. Nanda Kumar K
This case shows classic appearance of endometrioma vs hemorrhagic cyst.
The radiologist can try able to differentiate these two entities on MRI by the following features:
- endometriotic cyst
- T2 shading sign
- persistent signal on fat saturated images
- variable restriction on DWI/ADC images
- hemorrhagic cyst
- T2 hyperintense
- signal loss on fat saturated images
- no restriction on DWI/ADC images.