Patients had an evaluation every 3 months on the first year after
treatment and every 6 months thereafter. Follow-up included clinical
examination, contrast-enhanced MRI (or CT scan when MRI
was not feasible) and blood work. Acute toxicity was defined as
adverse events occurring within 3 months after the end of the
treatment and late toxicities as events occurring after 3 months,
and were graded according to the Common Terminology Criteria
for Adverse Events (CTCAE) v4.0. Classic and non-classic
Radiation induced liver disease (RILD were defined according to
QUANTEC 2010 [11,13]. We defined hepatic toxicity as the first
occurrence of classic or non-classic RILD or ascites anytime from
the treatment.
Response Evaluation Criteria in Solid Tumors (RECIST) v1.1 was
used to assess radiographic tumor response. Progression was also
assessed on MRI or CT-scan and included metastatic progression,
infield progression (occurring within the PTV) and outfield
progression (intrahepatic recurrence outside the PTV).