Figure 4c. Small fluid collection in an 18-year-old man who was clinically stable following a motor vehicle accident. (a) Longitudinal US image shows 1 cm of fluid adjacent to the spleen (the width of fluid is determined in small, curvilinear collections). No additional areas demonstrated fluid, resulting in a hemoperitoneum score of 1. (b) Longitudinal US image of the spleen obtained lateral to a shows a hyperechoic region (arrow), a finding that is consistent with parenchymal injury. (c) Helical CT scan helps confirm the splenic injury (arrows). The patient was successfully treated nonsurgically.