Although no clear history of trauma was present, this splenic injury corresponds to which grade?
According to the American Association for the Surgery of Trauma (AAST) splenic injury scale, this is a grade 3.
Large splenic subcapsular haematoma with contrast blush foci inferring active bleeding. Hypoenhancing areas of the splenic parenchyma are mostly superficial and with less than 3 cm in depth; splenic vascular hilum appears preserved. Free intraperitoneal fluid is of haematic content. The liver, pancreas, and adrenal glands are unremarkable. Bilateral renal cysts demonstrated, with no suspicious enhancement. No evidence of renal calculi. No abnormality of the bowel is identified. No free gas. No lymph node enlargement. No fractures or suspicious bone lesions.