Metastatic Disease Flashcards
most frequent sites distant mets
Lungs
Liver
what are common primary sites
Colon
Breast
Lungs
Liver
How do mets reach the liver
Lymphatics Portal system (Blood)
what does the incidence of hepatic mets depend on?
Type of tumor
stage
wwat is typical of metastatic disease
Multiple nodes throughout the liver
what are the three patterns of metastatic disease
1) well defined hypoechoic mass
2) well defined echogenic mass
3) Diffuse distortion of the normal homogenous parenchymal pattern without a focal mass
Common primary masses
renal cell carcinoma carcinoid choriocarcinoma transitional cell carcinoma islet cell carcinoma hepatocellular carcinoma
Echengic tumors
Common with primary colonic tumors
what may echogenic tumors have
Calcification
what do target patterns result from
Edema around the tumor or necrosis or hemorrhage within the tumor
target sign
Hyperechoic center with hypoechoic halo
Proliferating tumor
thick halo surround the echogenic center
What may result as nodules increase in size
Outgrow their blood supply, central necrosis and hemorrhage may result
hyperechoic masses
GI lesions
Neuroendocrine tumors
can various combinations of patterns be seen simultaneously
yes
