Riedel lobe
Updates to Article Attributes
Riedel's lobe is a an common anatomical variant of the liver to be aware of because it can simulate a mass.
Its misidentification as a pathologic abdominal mass has lead to laparotomy. Pathology can also occur within it (e.g. malignancy or even torsion) and cause atypical liver symptoms low in the pelvis 2, 4.
Epidemiology
Riedel's lobe has an incidence of ~17.5% (range 3.3-31%) and is more frequently found in females 2-3 with a M:F of approximately 1:3 4.
Gross anatomy
Riedel's lobe is a tongue-like, inferior projection of the right hepatic lobelobe of the liver beyond the level of the most inferior costal cartilage on cross-sectional images 1. It is not considered a true accessory lobe of the liver but an anatomical variant of the right lobe of the liver 3.
Riedel's lobe has an incidence of ~17.5% (range 3.3-31%) and is more frequently found in females 2-3 with a M:F of approximately 1:3 4.
Riedel's lobe is an important variant to be aware of because it can simulate a mass and has even lead to laparotomy 2 and pathology (e.g. malignancy or even torsion) can occur 4 and cause symptoms low in the pelvis.
Differential diagnosis
Etymology
It was originally reported in 1888 by Riedel in seven female patients who had palpable masses in the right hypochondrium, which were subsequently confirmed at surgery 2.
-<p><strong>Riedel's lobe </strong>is a tongue-like, inferior projection of the right hepatic lobe beyond the level of the most inferior <a href="/articles/costal-cartilage" title="costal cartilage">costal cartilage</a> on cross-sectional images <sup>1</sup>. It is not considered a true accessory lobe of the liver but an anatomical variant of the right lobe of the <a href="/articles/liver" title="liver">liver</a> <sup>3</sup>.</p><p>Riedel's lobe has an incidence of ~17.5% (range 3.3-31%) and is more frequently found in females <sup>2-3 </sup>with a M:F of approximately 1:3 <sup>4</sup>.</p><p>Riedel's lobe is an important variant to be aware of because it can simulate a mass and has even lead to laparotomy <sup>2 </sup>and pathology (e.g. malignancy or even torsion) can occur <sup>4</sup> and cause symptoms low in the pelvis.</p><h4>Differential diagnosis</h4><ul><li><a href="/articles/hepatomegaly" title="Hepatomegaly">hepatomegaly</a></li></ul><h4>Etymology</h4><p>It was originally reported in 1888 by <strong>Riedel</strong> in seven female patients who had palpable masses in the right hypochondrium, which were subsequently confirmed at surgery <sup>2</sup>. </p>- +<p><strong>Riedel's lobe </strong>is an common anatomical variant of the <a title="Liver anatomy" href="/articles/liver">liver</a> to be aware of because it can simulate a mass.</p><p>Its misidentification as a pathologic abdominal mass has lead to laparotomy. Pathology can also occur within it (e.g. malignancy or even torsion) and cause atypical liver symptoms low in the pelvis <sup>2, 4</sup>.</p><h4>Epidemiology</h4><p>Riedel's lobe has an incidence of ~17.5% (range 3.3-31%) and is more frequently found in females <sup>2-3 </sup>with a M:F of approximately 1:3 <sup>4</sup>.</p><h4>Gross anatomy</h4><p>Riedel's lobe is a tongue-like, inferior projection of the right lobe of the <a title="Liver anatomy" href="/articles/liver">liver</a> beyond the level of the most inferior <a href="/articles/costal-cartilage">costal cartilage</a> on cross-sectional images <sup>1</sup>. It is not considered a true accessory lobe of the liver but an anatomical variant of the right lobe of the <a href="/articles/liver">liver</a> <sup>3</sup>.</p><h4>Differential diagnosis</h4><ul><li><a href="/articles/hepatomegaly">hepatomegaly</a></li></ul><h4>Etymology</h4><p>It was originally reported in 1888 by <strong>Riedel</strong> in seven female patients who had palpable masses in the right hypochondrium, which were subsequently confirmed at surgery <sup>2</sup>. </p>
Image 3 X-ray (Frontal) ( create )
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