Grading system for assessing the radiographic outcome of treatment in LM-LVM malformations of the head and neck
| Grade | Description |
|---|---|
| 1 | Complete regression of the lesion on cross-sectional imaging |
| 2 | Near-complete regression with trace residual of the lesion on cross-sectional imaging |
| 3 | Partial regression with <50% estimated volume of residual malformation |
| 4 | Partial regression with >50% estimated volume of residual malformation |
| 5 | Minimal or no gross interval change |
| 6 | Regression of malformation in 1 region with progression into a previously uninvolved/untreated area |
| 7 | Gross interval progression |
| Modifier B | Granulation tissue formation in treatment bed |