RadEssentialReading-room reference
LI-RADS CT/MRI v2018
Applies only to patients at high risk for HCC (cirrhosis, chronic HBV, current or prior HCC). Assign LR-M, LR-TIV, LR-1/2 first; use the diagnostic table for the rest.
| APHE | Size | 0 additional features | 1 additional feature | ≥2 additional features |
|---|---|---|---|---|
| None | <20 mm | LR-3 | LR-4 | LR-4 |
| None | ≥20 mm | LR-3 | LR-4 | LR-4 |
| Nonrim | <10 mm | LR-3 | LR-4 | LR-4 |
| Nonrim | 10–19 mm | LR-3 | LR-4 capsule only LR-5 washout or growth | LR-5 |
| Nonrim | ≥20 mm | LR-4 | LR-5 | LR-5 |
Additional major features: nonperipheral washout · enhancing capsule · threshold growth (≥50% size increase in ≤6 months).
Categorize
Category–Before ancillary features. Ancillary features can upgrade by one category (not to LR-5) or downgrade.
Other categories
| Category | Meaning |
|---|---|
| LR-NC | Not categorizable: image degradation or omission |
| LR-1 | Definitely benign |
| LR-2 | Probably benign |
| LR-M | Probably or definitely malignant, not HCC specific (targetoid features, e.g. rim APHE, peripheral washout, delayed central enhancement) |
| LR-TIV | Tumor in vein: enhancing soft tissue in vein, regardless of parenchymal mass |
Sources
- Chernyak V, Fowler KJ, Kamaya A, et al. Liver Imaging Reporting and Data System (LI-RADS) version 2018: imaging of hepatocellular carcinoma in at-risk patients. Radiology. 2018;289:816–830.PubMed ↗
Radessential summarizes published classification systems for practicing radiologists. Summaries are condensed; confirm details against the cited source before relying on them for patient care.