| Grade | Type of injury | Description of injury |
| I | Hematoma | Subcapsular, <10% |
|
| Laceration | Capsular tear, <1 cm in depth |
| II | Hematoma | Subcapsular, 10% - 50%; intraparenchymal, <5 cm in diameter |
|
| Laceration | Capsular tear, 1 - 3 cm in parenchymal depth, not involving trabecular vessel |
| III | Hematoma | Subcapsular, >50% surface area or expanding, ruptured subcapsular or parenchymal hematoma; intraparenchymal hematoma, ≥5 cm or expanding |
|
| Laceration | >3 cm in parenchymal depth or involving trabecular vessel |
| IV | Laceration | Segmental or hilar vessels, major devascularization (>25%) |
| V | Laceration | Completely shattered spleen |
|
| Vascular | Hilar vascular injury that devascularizes the spleen |