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Friday, 15 April 2011
Focal leasions in the liver
Hemangioma in the live:
In the 7th segment of the liver, a 13 mm rounded echogenic area is seen, elsewhere the liver is homogeneous. - Dont`t confuse with focal fatty infiltration of the liver usually seen arround the GB, or the echogenic ligamentum teres.
- A hemangioma can be echogenic or isoechoic.
- Smooth margins, round or oval in shape.
- Often multiple, may contain calcifications, rarely has a peripheral rim.
- Unlike FNH hemangiomas are vascularised in a peripheral-to-central pattern => aka iris diaphragm sign.
Arterial phase (20-30 sec): outer portions enhance, center remains hypoechoic.
Portal phase (40-100 sec): central portions become increasingly echogenic.
Venous phase (110-180 sec): the entire leasion is hypoechoic.