Definition:

• Observation with diameter 10-19mm, arterial hyperenhancement and diameter increase by 50% or more on serial exams ≤ 6 months apart

LI-RADS Categorization

• Observations with diameter 10-19mm, arterial hyperenhancement, and diameter increase by 50% or more on serial exams <6 months apart should be categorized: If unsure of diameter increase or arterial hyperenhancement, do not categorize as LR-5g and use table for appropriate categorization
  • LR-5g if there is none of the following: capsule appearance, washout appearance
  • LR-5 if there is >1 of the following: capsule appearance, washout appearance

Comments:

• OPTN 5A-g is defined in OPTN policy 3.6.4.4 for liver allocation
• Some OPTN 5A-g nodules could also be considered OPTN 5A/LR-5
  • OPTN 5A nodules must have all of the following features: diameter of 10-19mm, arterial hyperenhancement, washout and capsule appearance
  • Nodules that meet criteria for OPTN 5A-g and also have washout and/or capsule appearance should be considered LR-5
  • Note that diameter increase by 50% or more on serial exams ≤ 6 months apart is a subset of threshold growth
    • Observations with diameter 10-19mm, arterial hyperenhancement, and diameter increase documented only on exams >6 months apart cannot be categorized LR-5g