Double line sign
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The double line sign is an MRI finding seen at the periphery of a region of osteonecrosis (avascular necrosis, bone infarct). It is best seen on T2 weighted sequences and consists of an inner bright T2 line representing granulation tissue and surrounding dark zones representing adjacent sclerotic bone. This sign is reported in up to 80% of cases 3.
It should not be confused with the rim sign demarcating an osteochondral fragment with surrounding fluid (indicating that it is potentially unstable).
See also
-<p>The <strong>double line sign</strong> is an MRI finding seen at the periphery of a region of osteonecrosis (<a href="/articles/avascular-necrosis">avascular necrosis</a>, <a href="/articles/bone-infarction-1">bone infarct</a>). It is best seen on T2 weighted sequences and consists of an inner bright T2 line representing granulation tissue and surrounding dark zones representing adjacent sclerotic bone. This sign is reported in up to 80% of cases <sup>3</sup>.</p><p>It should not be confused with the <a href="/articles/rim-sign-of-avascular-necrosis">rim sign</a> demarcating an <a href="/articles/osteochondral-injury-staging">osteochondral fragment</a> with surrounding fluid (indicating that it is potentially unstable).</p><h4>See also</h4><ul><li><a href="/articles/crescent-sign-of-avascular-necrosis-1">Crescent sign of AVN</a></li></ul>- +<p>The <strong>double line sign</strong> is an MRI finding seen at the periphery of a region of osteonecrosis (<a href="/articles/avascular-necrosis">avascular necrosis</a>, <a href="/articles/bone-infarction-1">bone infarct</a>). It is best seen on T2 weighted sequences and consists of an inner bright T2 line representing granulation tissue and surrounding dark zones representing adjacent sclerotic bone. This sign is reported in up to 80% of cases <sup>3</sup>.</p><p>It should not be confused with the <a href="/articles/rim-sign-of-avascular-necrosis">rim sign</a> demarcating an <a href="/articles/osteochondral-injury-staging">osteochondral fragment</a> with surrounding fluid (indicating that it is potentially unstable).</p><h4>See also</h4><ul><li><a href="/articles/crescent-sign-of-avascular-necrosis-1">crescent sign of avascular necrosis</a></li></ul>
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