Loading...
Publication
The shading sign: is it exclusive of endometriomas?
| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| 1.43 MB | Adobe PDF |
Advisor(s)
Abstract(s)
Objectives: To investigate if the shading sign is an
exclusive MRI feature of endometriomas or endometrioid
tumors, and to analyze its different patterns.
Methods: Three hundred and fourty six women with
adnexal masses who underwent 1.5/3-T MRI were included
in this retrospective, board-approved study. The shading
sign was found in 56 patients, but five cases were excluded
due to lack of imaging follow-up or histological correlation.
The final sample included 51 women. The type of tumor and
the pattern of shading were recorded for each case.
Results: Thirty endometriomas and five endometrioid
carcinomas were found. The remaining 16 cases corresponded
to other benign and malignant tumors. The
overall sensitivity, specificity, positive predictive value,
and negative predictive value were 73%, 93%, 59%, and
96%, respectively. Restricting the analysis to cystic lesions
without solid or fat component, sensitivity, specificity,
positive predictive value, and negative predictive value
were 73%, 96%, 94%, and 80%. Five shading patterns were
identified: layering (15.7%), liquid–liquid level (11.8%),
homogenous (45.1%), heterogeneous (11.8%), and
focal/multifocal shading within a complex mass (19.6%).
No significant correlation was found between these
patterns and the type of tumor.
Conclusions: The shading sign is not exclusive of
endometriomas or endometrioid tumors. Homogenous
shading was the most prevalent pattern in endometriomas
and half of the cases with focal/multifocal shading within a
complex mass were endometrioid carcinomas.
Description
Keywords
Endometrioma Endometrioid carcinoma Magnetic resonance imaging Gynecology Imaging
Citation
Joao Lopes Dias; Filipe Veloso Gomes; Rita Lucas; Teresa Margarida Cunha. The Shading Sign: Is It Exclusive of Endometriomas?, Abdominal Imaging, 40, 7, 2566-2572, 2015.
Publisher
Springer