Anomalous right lobe of the liver: CT appearance

Abstract

We report five cases of anomalous right lobe of the liver diagnosed by computed tomography (CT). There were three men and two women, with an average age of 67 years. The right lobe was deformed and decreased in size in all patients. Hypertrophy of the left lobe was present in all patients.

MR Imaging of Anomalous Lobes of the Liver

“…A hepatic lobe anomaly is sometimes associated with biliary tract disease, portal hypertension, and other congenital anomalies (3,8,16). In our cases, the anomaly was associated with hepatic cysts, gallstones, gastric and ureteral cancer.…”

“…Fewer than 40 reports of right lobe agenesis or hypoplasia have been published (8,10,16). The anterior segment There are 2 hypointense structures lateral to the liver, which at c) T2-weighted imaging (2000/80) are hyperintense, representing a hepatic cyst (C) and the gallbladder (GB).…”

CT of agenesis and atrophy of the right hepatic lobe

“…As in our study, all of the cases of severe atrophy had at least one recognizable structure. As to the enlargement of the medial and lateral segments of the left lobe and the caudate lobe, it has been classified as mildly, moderately, or greatly enlarged [1,4]. However, ''mildy, moderately, and greatly'' were not defined.…”

“…Before the introduction of cross-sectional imaging modalities, such as ultrasonography (US), computed tomography (CT), and magnetic resonance imaging, it was discovered during laparotomy or autopsy or was detected by more invasive studies such as angiography and percutaneous cholangiography. Since the use of US and CT, several articles discussing the diagnosis of this entity by CT and US have been published [1][2][3][4][5]. The imaging modalities used included CT, US, angiography, percutaneous cholangiography, and hepatobiliary scintigraphy, with CT being the most commonly used.…”

Lobar atrophy of the liver

“…In contrast, atrophy of the left lobe does not induce such a marked enlargement of the right lobe. In reviewing the literature, we noted that some cases used to illustrate lobar atrophy of the liver showed similar tendencies [4,6]. Whether or not atrophy of the right lobe is more likely to induce a compensatory enlargement of the remaining hepatic tissue should be investigated.…”