In its classic definition, by FranÃ§ois-Louis Ganshof (1944), feudalism describes a set of reciprocal legal and military obligations among the warrior nobility revolving around the three key concepts of lords, vassals and fiefs.
The exact cause of intracardiac echogenic foci remains unclear; however, they appear to be caused by small deposits of calcium in the papillary muscle of the fetal heart.
Causes of generalised increased liver echogenicity includes: 1  diffuse fatty infiltration. 2  cirrhosis: can be coarsened as well. 3  chronic hepatitis 3: can be coarsened as well. 4  diffuse infiltration or deposition. 5  malignant process.