NCIt definition : A microscopic finding indicating the formation of cystic structures in a tissue sample.;
Alternative definition : CDISC: A finding consisting of multilocular cysts lined by fine septa containing fine
flocculent eosinophilic material or, in some tissues, blood. The cysts are not lined
by endothelial cells and do not compress the surrounding parenchyma. This does not
include congenital polycystic change. (INHAND);