Acute hepatitis
Diagnosis almost certain
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Periportal halo also known as periportal collar sign refers to area of low attenuation around the intrahepatic portal veins on contrast-enhanced CT suggestive for periportal edema. This sign is non-specific and can be seen in various conditions such as acute hepatitis, congestive cardiac failure and lymphadenopathy at the porta hepatis causing lymphatic obstruction.
-<p><a title="Periportal halo (CT/US)" href="/articles/periportal-halo-ctus">Periportal halo</a> also known as periportal collar sign refers to area of low attenuation around the intrahepatic portal veins on contrast-enhanced CT suggestive for periportal edema. This sign is non-specific and can be seen in various conditions such as <a href="/articles/acute-hepatitis">acute hepatitis</a>, <a href="/articles/congestive-cardiac-failure">congestive cardiac failure</a> and <a href="/articles/lymph-node-enlargement">lymphadenopathy</a> at the <a href="/articles/porta-hepatis">porta hepatis</a> causing lymphatic obstruction.</p><p> </p>- +<p><a href="/articles/periportal-halo-ctus">Periportal halo</a> also known as periportal collar sign refers to area of low attenuation around the intrahepatic portal veins on contrast-enhanced CT suggestive for periportal edema. This sign is non-specific and can be seen in various conditions such as <a href="/articles/acute-hepatitis">acute hepatitis</a>, <a href="/articles/congestive-cardiac-failure">congestive cardiac failure</a> and <a href="/articles/lymph-node-enlargement">lymphadenopathy</a> at the <a href="/articles/porta-hepatis">porta hepatis</a> causing lymphatic obstruction.</p>
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