Liver metastases with posterior acoustic shadow in echography: causes and differential diagnosis
Rubaltelli, L.; Zacchi, C.; Angelini, F.; Bulzacchi, A.
La Radiologia Medica 69(5): 316-319
1983
ISSN/ISBN: 0033-8362 PMID: 6658039 Document Number: 197800
Seven cases of metastases with acoustic shadow have been detected in a series of 108 liver metastases. In two cases this echographic pattern corresponded to calcified metastases and in one case to a necrotic metastasis, containing gas. In the last four cases the presence of an acoustic shadow (all colon carcinoma metastases in chemotherapy) must be attributed to the tissue characteristics of the lesion, since neither calcifications nor gas could be shown by CT. A possible effect of chemotherapy in causing this type of image can be thought to exist; this, according to the finding of hypoechogenic metastases turning to the same above mentioned pattern following chemotherapy.