GAMUT G-172
HYPERVASCULAR OR HYPERDENSE LIVER LESION (Angio, Postcontrast CT, MRI)


COMMON
*1. Focal fatty sparing (simulates enhancing mass)
*2. Focal nodular hyperplasia 
*3. Hemangioma , cavernous or capillary
4. Hepatoblastoma
5. Hepatocellular adenoma 
6. Hepatocellular carcinoma (hepatoma)  
*7. Metastasis, hypervascular (eg, carcinoid; islet cell tumor of pancreas; pheochromocytoma; leiomyosarcoma; other sarcomas; choriocarcinoma; carcinoma of breast, colon, kidney, or thyroid; malignant melanoma)


UNCOMMON
1. Aneurysm of hepatic artery, true or false (incl. arteriobiliary fistula) or portal vein
2. Angiosarcoma of liver
*3. Arteriovenous fistula (eg, congenital; traumatic; iatrogenic); arterio-portal shunt in some hepatomas
4. Cholangiocarcinoma  (delayed enhancement)
5. Fibrolamellar carcinoma 
6. Hemangioendothelioma, epithelioid
7. Vascular phenomena (eg, SVC obstruction; Budd-Chiari S.; transient hepatic attenuation difference {THAD})


* May be multiple.




References