8 years old girl with diffuse abdominal pain a few hours after punch from a schoolboy, aimed to abdominal ultrasound.
At ultrasound internal organs of the abdomen with no complications, there is no free fluid in the abdomen also but in the upper third of the right rectus abdominis muscle is visualized wide muscle portion with increased echogenicity and a unclear border, at compression of this area with probe sharp pain revealed - presumably contusion / hematoma of the rectus abdominis muscle.
Image legend: C - contusion, N - normal rectus abdominis muscle, scanned at the same level of other side of body.