OBJECTIVES: The purpose of this study was to assess @entity157 with particular attention to posterior acoustic effects. METHODS: We performed an Institutional Review Board-approved retrospective review of @entity1 with @entity157 who had undergone sonographically guided procedures in our department between 2001 and 2010. A total of 247 masses thought to represent @entity157 were identified; 27 were excluded because of prior angioembolization (altering the sonographic appearance), alternate histologic diagnoses, and incomplete @entity1 information or imaging. Ultimately, 220 masses in 185 @entity1 (138 @entity1 and 47 @entity1 ; average age, 59.1 years) constituted the study population. Preprocedure sonograms were reviewed in consensus by 3 abdominal radiologists; the liver echo texture, lesion echogenicity, and posterior acoustic effect were rated and correlated with @entity1 data. RESULTS: The average mass size was 3.1 cm (range, 0.7-17 cm). In total, 84.1% of the masses (n = 185) arose in abnormally echogenic/attenuating livers; 54.1% of the masses (n = 119) were predominantly hypoechoic, 23.2% (n = 51) isoechoic, and 22.7% (n = 50) hyperechoic. Target-type morphologic characteristics were noted in 41 masses. Many masses (52.7% [n = 116]) had no specific posterior acoustic effect, but nearly half (46.4%) had either mild (n = 64) or marked (n = 38) posterior acoustic enhancement. The remaining masses (0.9% [n = 2]) had posterior shadowing. Posterior acoustic enhancement was most common among hyperechoic masses (62% with posterior acoustic enhancement), target-type masses (63%), and masses larger than 5 cm (81.5%). CONCLUSIONS: Posterior acoustic enhancement is present to some degree in almost half of @entity157 , which may relate to the tissue characteristics of the @entity5 or the cirrhotic liver itself. Attention to this finding, including scanning without spatial compounding, is recommended during sonographic screening for @entity157 in the growing population of @entity1 with @entity409 .

Posterior acoustic enhancement in XXXX .

@entity1 :: ('9606', 'Species') :: ['women', 'patients', 'patient', 'men'] @entity157 :: ('MESH:D006528', 'Disease') :: ['hepatocellular carcinoma', 'hepatocellular carcinomas', 'sonographic appearances of hepatocellular carcinoma'] @entity409 :: ('MESH:D008107', 'Disease') :: ['liver disease'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumor']
@entity157 :: (MESH:D006528,Disease) :: ['hepatocellular carcinoma']
