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Yamaha
09-04-11, 11:43 AM
Congenital abnormalities of human liver are rare. A possibility of the presence of the abnormal liver has to be kept in mind when an unexplained abdominal mass is encountered. There are many kinds of described congenital abnormalities of the liver as agenesis of its lobes, absences of its segments, deformed lobes, decrease in size of
lobes,lobar atrophy, hypoplastic lobes, transposition of the gall bladder & Riedel’s lobe. Absence of a hepatic lobe is a rare anomaly of liver development. It is usually noted incidentily at autopsy or surgery. Absent right and left hapatic lobes are generally asymptomatic.
In 383 patient by using CT (190 men, 193 women without hapatic parenchymal abnormality or another hapatic pathology in the cases): absence of the left lobe liver 2.87%, posterior segment of the right lobe 1.30%, anterior segment of the left lobe 0.78%, right lobe 0.26%.
From: Aktan, Z.A.1 Savas, R.2 Pinar, Y.1 Arslan, O3 1Department of Anatomy, 2Department of Radiology, Ege University, Izmir 3Department of Anatomy, Celal Bayar University, Manisa TURKEY.

tknguyen
07-05-11, 11:49 AM
Congenital abnormalities of human liver are rare. A possibility of the presence of the abnormal liver has to be kept in mind when an unexplained abdominal mass is encountered. There are many kinds of described congenital abnormalities of the liver as agenesis of its lobes, absences of its segments, deformed lobes, decrease in size of
lobes,lobar atrophy, hypoplastic lobes, transposition of the gall bladder & Riedel’s lobe. Absence of a hepatic lobe is a rare anomaly of liver development. It is usually noted incidentily at autopsy or surgery. Absent right and left hapatic lobes are generally asymptomatic.
In 383 patient by using CT (190 men, 193 women without hapatic parenchymal abnormality or another hapatic pathology in the cases): absence of the left lobe liver 2.87%, posterior segment of the right lobe 1.30%, anterior segment of the left lobe 0.78%, right lobe 0.26%.
From: Aktan, Z.A.1 Savas, R.2 Pinar, Y.1 Arslan, O3 1Department of Anatomy, 2Department of Radiology, Ege University, Izmir 3Department of Anatomy, Celal Bayar University, Manisa TURKEY.


1. Normal liver:
http://4.bp.blogspot.com/_KPeHaomc3-Q/S2f-KGD6RNI/AAAAAAAAARo/qPj0OaOC8q4/s200/liver1b.gif
http://www.ngoaikhoathuchanh.info/images/thmb_43ed98f46526bsegment-numbering-2.jpg

More information:
http://www.ycantho.com/qa/showthread.php?8787-C%C3%A1ch-ph%C3%A2n-chia-h%E1%BA%A1-ph%C3%A2n-th%C3%B9y-gan-%28N1%29

2. Congenital disorders of the liver are rare but nevertheless, there are many kinds of described congenital abnormalities of the liver due to agenesis (lack of development) of its lobes. These include

Absence of its segments
Deformed lobes
Decrease in size of lobes
Lobar atrophy(shrunken)
Hypoplastic (under-developed) lobes
Transposition of the gall bladder
Riedel's lobe ( a tongue like projection of the right lobe of the liver).

some figures:

http://www.indmedica.com/journals/images/jasi/050_001_anomolies_fig1.jpg
Fig. 1. Absence of the left liver lobe in cadaver




http://www.indmedica.com/journals/images/jasi/050_001_anomolies_fig2.jpg
Fig. 2. A transverse fissure in quadrate lobe.



More information:
http://www.thelivercarefoundation.org/?page=congenital
http://www.sinhvienykhoa.net/forum_posts.asp?TID=1317&OB=DESC