Huge Endometrioma Mimicking Mucinous Cystadenoma on MR: A Case Report

Im Kyung Hwang, Bong Soo Kim, Sook Namkung, Heung Cheol Kim, Yun Sik Yoo, Mee Ran Lee, Woo Chul Hwang
In: Journal of the Korean Radiological Society · 2001 · vol. 45(6) , pp. 627 · doi:10.3348/jkrs.2001.45.6.627 · W2336120471
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This case report describes a huge endometrioma that was misdiagnosed as a mucinous cystadenoma on MRI due to atypical signal intensities and scanty T2 shading, highlighting the importance of recognizing variable imaging features in endometriosis.

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This case report describes a patient with an unusually large endometrioma that presented atypical features on magnetic resonance imaging. The lesion exhibited varying signal intensities on T1- and T2-weighted images with scanty shading, leading to a misdiagnosis of mucinous cystadenoma rather than the expected endometrioma characteristics. The authors highlight how these atypical imaging findings can obscure the diagnosis, emphasizing the importance of recognizing variable presentations in ovarian masses. This paper is centrally about endometriosis — specifically the diagnostic challenge of distinguishing endometriomas from other ovarian cysts using MRI.

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Abstract

Endometriosis is a relatively common gynecologic disease affecting women during their reproductive years. For its diagnosis, magnetic resonance imaging has been shown to have greater specificity than other modalities. Although lesions may show variable signal intensity due to numerous stages of bleeding, the characteristic finding of endometrioma which distinguishes it from other ovarian cystic masses is relatively high signal intensity on T1-weighted images and heterogeneous signal intensity with prominent shading on T2-weighted images. We report an atypical case involving a huge endometrioma. Because of varying signal intensity on T1- and T2-weighted images and scanty shading on T2-weighted images, the findings were misinterpreted and mucinous cystadenoma was diagnosed.
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Published online Mar 11, 2016. https://doi.org/10.3348/jkrs.2001.45.6.627 Huge Endometrioma Mimicking Mucinous Cystadenoma on MR: A Case Report Abstract Endometriosis is a relatively common gynecologic disease affecting women during their reproductive years. For its diagnosis, magnetic resonance imaging has been shown to have greater specificity than other modalities. Although lesions may show variable signal intensity due to numerous stages of bleeding, the characteristic finding of endometrioma which distinguishes it from other ovarian cystic masses is relatively high signal intensity on T1-weighted images and heterogeneous signal intensity with prominent shading on T2-weighted images. We report an atypical case involving a huge endometrioma. Because of varying signal intensity on T1- and T2-weighted images and scanty shading on T2-weighted images, the findings were misinterpreted and mucinous cystadenoma was diagnosed.

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