According to the American Association for the Surgery of Trauma grading system, a laceration to the spleen under one centimeter in depth would be classified as a ____ injury.

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According to the American Association for the Surgery of Trauma grading system, a laceration to the spleen under one centimeter in depth would be classified as a Grade I injury. Grade II injuries range from 1 to 3 centimeters in depth, Grade III injuries are greater than 3 centimeters in depth and may involve the blood vessels of the spleen, while Grade IV injuries involve a laceration completely through the spleen with fragmentation of the organ.