T2 dark spot sign (endometrioma)

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T2 dark spot sign is an MRI appearance of endometriomas seen as a result of chronic haemorrhage. The sign is useful in differentiating a solitary endometrioma from a functional hemorrhagic cyst, as both might show high T1 signal with T2 shading.

The T2 dark spot, described in the sign, is seen within the cyst, often against the cyst wall, but not within the cyst wall itself (which is usually of low T2 signal due to ~~hemosideri~~hemosiderin-laden macrophages and fibrous component of the cyst wall).

-T2 dark spot sign is an MRI appearance of endometriomas seen as a result of chronic haemorrhage. The sign is useful in differentiating a solitary endometrioma from a functional hemorrhagic cyst, as both might show high T1 signal with T2 shading. The T2 dark spot, described in the sign, is seen within the cyst, often against the cyst wall, but not within the cyst wall itself (which is usually of low T2 signal due to hemosideri-laden macrophages and fibrous component of the cyst wall).
+T2 dark spot sign is an MRI appearance of endometriomas seen as a result of chronic haemorrhage. The sign is useful in differentiating a solitary endometrioma from a functional hemorrhagic cyst, as both might show high T1 signal with T2 shading. The T2 dark spot, described in the sign, is seen within the cyst, often against the cyst wall, but not within the cyst wall itself (which is usually of low T2 signal due to hemosiderin-laden macrophages and fibrous component of the cyst wall).

References changed:

1. Corwin MT, Gerscovich EO, Lamba R et-al. Differentiation of ovarian endometriomas from hemorrhagic cysts at MR imaging: utility of the T2 dark spot sign. Radiology. 2014;271 (1): 126-32. <a href="http://dx.doi.org/10.1148/radiol.13131394">doi:10.1148/radiol.13131394</a> - <a href="http://www.ncbi.nlm.nih.gov/pubmed/24475842">Pubmed citation</a>

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Signs

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Gynaecology

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T2 dark spot sign (endometrioma)

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