Abd Picture

8/8/2019 Abd Picture

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Fig. 4AD. Multiple hepatocellular adenomas. A On noncontrast

enhanced CT scan,multiple masses with slightly high attenuationare seen in liver with relatively low attenuation due to fatty change.

B On T1-weighted MR image, lesions demonstrate hypointense

signal to liver. C Gadolinium-enhanced fat suppression T1-weighted

image demonstrates intense enhancement of the lesions. Note

heterogeneous enhancement of the lesion in right lobe of the liver.

D On T2-weighted image the lesions are isointense to liver and arenot detectable


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Fig. 7AC. Focal nodular hyperplasia: CT findings. A Helical CT

scan at arterial phase of contrast-enhancement demonstrates a

well-defined area of increased attenuation corresponding to a hypervascular

FNH. The scar is see as a central spiculated area of hypodensity.B On portal venous phase, the lesion is isodense compared

to the normal liver, while the central fibrotic scar remains

hypodense. C On delayed CT scan, the central scar demonstrates

delayed enhancement


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Large HCC with mosaic pattern. A Macroscopic view

showing a heterogeneous lesion with multiple compartments.

B Arterial phase of a helical CT scan demonstrating the lesion heterogeneity

with hyper-and hypovascular components. C On delayed

CT scan, the tumor capsule is clearly visualized.D T2-weighted

MR image shows the mosaic pattern with components of different

signal intensities. E Gadolinium-enhanced T1-weighted GRE

MR imaging demonstrating the tumor capsule


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Fibrolamellar hepatocellular carcinoma. A Macroscopic

view of the lesion with a focal nodular-like appearance; a central

scar is evident. Some necrotic foci are seen within the tumor. B At

low magnification, histologic analysis shows the fibrous hyalinized

stroma surrounding sheaths of tumoral cells. C At higher magnification,

pale bodies are seen in the cytoplasm of tumoral cells. DUnenhanced CT shows a large tumor containing a central calcification.

E, FLesion enhancement is heterogeneous in the portal-venous

(E) and delayed phase (F) imaging. G, H On MRI the lesion is

heterogeneous and contains an hypointense scar on both T2 (G)

and T1 (H) images. I, J Lesion enhancement mimics that of focal

nodular hyperplasia on arterial (I) and portal-venous (J) phaseimages


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Pancreatic primitive neuroectodermal tumor (PNET).

On the Gd-DTPA-enhanced GE T1-weighted axial (A) and coronal

(B) MR images, a huge mass originating from the body of the pancreas

occupies the abdomen. The tumor has a mixed solid and cystic

content


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Splenic hemangioma. A Ultrasound shows a discrete

echogenic 6-cm mass in the spleen. B Unenhanced CT shows

splenic hemangioma as a hypodense partially cystic mass withcalcifications. C Contrast-enhanced CT image in a patient with hemangiomatosis

shows multiple predominantly cystic lesions in an

enlarged spleen. D Gross appearance. Cut section demonstrates a

well-circumscribed mass with predominantly solid appearance.

E Photomicrograph of splenic hemangioma shows a vascular

channel lined with a single layer of endothelium


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Gallbladder carcinoma in a 65-year-old womanwith abdominal

pain. A, B Intravenous contrast-enhanced CT

scans show

mural thickening (arrow) that is more

prominent along the anterior

wall. There is tumor infiltration of thehepatoduodenal ligament

(arrow) and hepatic invasion (curved arrow). C

Opened resected

specimen shows neoplastic mural thickening

and pigment

stones


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Cystic renal cell carcinoma. A Contrast-

enhanced CT

shows a predominately cystic mass in the left

kidney. The mural

nodes (arrow) exclude the diagnosis of a

benign mass. B, C The

outer surface of the tumor is smooth (B), but

at cross-section, the

inner surface is irregular (


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Ewings sarcoma. In the US scan in the axialplane (A),

a voluminous, mainly hyperechoic mass can be

seen with a solid,

irregular content. There are multiple

hypodense areas within (necrotic).

In the CT scan after CM administration (B), avoluminous

hyperdense mass is visible, within which

multiple hypodense areas

are confirmed, corresponding to the

hypointense areas visualized

in the SE T1-weighted coronal MR scans aftergadolinium administration

(C)

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