Table 3.

Traditionally used American Association for the Surgery of Trauma (AAST) scoring system for splenic injuries

Grade	Hematoma	Laceration
I	Subcapsular < 10 % of surface area	Capsular tear < 1 cm deep into parenchyma
II	Subcapsular 10–50 % of surface area	Capsular tear 1–3 cm deep into parenchyma NO involvement of trabecular vessels
III	Subcapsular > 50 % of surface area OR Expanding, ruptured subcapsular or parenchymal hematoma OR Intraparenchymal hematoma > 5 cm or expanding	>3 cm deep into parenchyma or trabecular vessel involvement
IV		Segmental or hilar vessel involvement with major devascularization (>25 %) of spleen
V	Shattered spleen	Hilar vascular injury that devascularizes spleen