Hepatomegaly refers to an increase in size or enlargement of the liver.
Hepatomegaly can result from a vast range of pathology including, but not limited to, the following:
- malignancy/cellular infiltrate
- acquired hepatic conditions
- acquired non hepatic conditions
- congenital anomalies
Assessment of liver size in commonly made on ultrasound or CT, although gross hepatomegaly may be apparent on plain film imaging.
A liver that is longer than 15.5cm in the mid-clavicular line is considered enlarged, however in practice assessment is often subjective. Features that support hepatomegaly include 1:
- extension of the right lobe inferior to the lower pole of the right kidney
- rounding of the hepatic inferior border
- Riedel's lobe (normal variant)