Editing Liver lesions (section)

== Cirrhotic liver ==

* HCC
** Can use LI-RADS to classify risk of HCC
** CT
*** Non-con: hypodense lesion
*** Arterial: vivid '''non-rim arterial enhancement'''
**** But 10% of HCC are hypodense in arterial phase
**** Needs to be late arterial phase - allow enough time for contrast to get there
*** PV: rapid washout to become indistinct/hypodense, with enhancing capsule/pseudocapsule
*** Delayed: isodense with liver
***
*** Note that non-rim arterial hyperenhancement AND washout in PV phase have 100% specificity in HCC > 2cm, 90% in HCC 1-2cm (assuming the patient has correct pre-test probability of cirrhosis)
* Cirrhotic/regenerative nodules
** Normal cirrhotic liver
* Macroregenerative lesions
** Benign

[[Category:Radiology]]