T2 dark spot sign (endometrioma)
Updates to Article Attributes
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 haemorrhagic ovarian 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 haemosiderin-laden macrophages and fibrous component of the cyst wall).
T2 dark spot sign has high specificity in diagnosing endometriomas than T2 shading sign 2.
Differential diagnosis
This sign can also be seen in cystic ovarian tumours like serous cystadenomas, in which the T2 dark spot is part of a haemorrhagic tumour or calcification 3,4.
See also
-<p><strong>T2 dark spot sign </strong>is an MRI appearance of <a href="/articles/endometrioma">endometriomas</a> seen as a result of chronic haemorrhage. The sign is useful in differentiating a solitary endometrioma from a functional <a href="/articles/haemorrhagic-ovarian-cyst">haemorrhagic ovarian cyst</a>, as both might show high T1 signal with <a href="/articles/shading-sign-endometrioma">T2 shading</a>. </p><p>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 haemosiderin-laden macrophages and fibrous component of the cyst wall).</p>- +<p><strong>T2 dark spot sign </strong>is an MRI appearance of <a href="/articles/endometrioma">endometriomas</a> seen as a result of chronic haemorrhage. The sign is useful in differentiating a solitary endometrioma from a functional <a href="/articles/haemorrhagic-ovarian-cyst">haemorrhagic ovarian cyst</a>, as both might show high T1 signal with <a href="/articles/shading-sign-endometrioma">T2 shading</a>. </p><p>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 haemosiderin-laden macrophages and fibrous component of the cyst wall).</p><p>T2 dark spot sign has high specificity in diagnosing endometriomas than T2 shading sign <sup>2</sup>.</p><h4>Differential diagnosis</h4><p>This sign can also be seen in cystic ovarian tumours like serous cystadenomas, in which the T2 dark spot is part of a haemorrhagic tumour or calcification <sup>3,4</sup>.</p><h4>See also</h4><ul><li><a href="/articles/shading-sign-endometrioma">shading sign (endometrioma)</a></li></ul>
References changed:
- 4. Cansu A, Bulut E, Dinc G et al. Diagnostic Efficacy of T2 Dark Spot, T2 Dark Rim Signs, and T2 Shading on Magnetic Resonance Imaging in Differentiating Endometriomas From Hemorrhagic Cysts. J Comput Assist Tomogr. 2019;43(4):619-22. <a href="https://doi.org/10.1097/rct.0000000000000892">doi:10.1097/rct.0000000000000892</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/31268877">Pubmed</a>
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