How does HCA appear on US CT and MRI? General: HCAs are more common in women and are associated with oral contraceptive use. HCAs can cause morbidity and mortality because of their propensity for hemorrhage and rare malignant degeneration to HCC. HCAs are often 8 to 15 cm in diameter when diagnosed. HCAs contain few if …
Appearance of FNH on US CT and MRI General: FNH is the second most common benign hepatic tumor and it is more common in women. FNH contains all of the normal liver elements, but in an abnormal arrangement. It is typically smaller than 5 cm in diameter and solitary. The characteristic feature of FNH is the …
US CT and MRI features of hepatic hemangiomas US: Cavernous hemangiomas appear as well-defined hyperechoic masses in a normal liver. Doppler and color flow imaging usually demonstrate no detectable flow within the mass as blood flow is usually very slow; however, a feeding vessel may sometimes be detected. Occasionally hemangiomas have a mixed or hypoechoic appearance, …
How does HCC appear on US CT and MRI? General: In the United States, more than 80% of patients with HCC have underlying liver disease (e.g., cirrhosis). Men are three times more commonly affected. US: Appearance is variable, sometimes simulating metastatic disease. HCCs smaller than 5 cm are often hypoechoic, whereas larger lesions have mixed echogenicity. Fat …
What are the three growth patterns of HCC? A. Large solitary mass (50%) B. Multifocal HCC (40%) C. Diffuse infiltration (10%)
How do liver metastases appear on US CT and MRI? US: Appearance is variable. Gastrointestinal and more vascular tumors (e.g., islet cell, carcinoid, choriocarcinoma, renal cell carcinomas) tend to produce hyperechoic metastases, which may mimic a hemangioma. Hypoechoic lesions are also common, particularly with lymphoma, breast, lung, and cystic or necrotic metastases. Hypoechoic halos surrounding liver …
Which is the most sensitive examination for detecting hemochromatosis? MRI: Because many patients with hemochromatosis will develop cirrhosis and 25% will develop HCC, it is important to diagnose early. US: US examination is normal despite iron deposition, unless underlying cirrhosis is present. NCCT: Liver attenuation is typically more than 70 HU in hemochromatosis, compared with a normal level …
Most sensitive examination for detecting hemochromatosis Read More »