The left obturator internus muscle is thickened, no pelvic sidewall haematoma.
Left sacral ala fracture lateral to the sacral foramina without significant displacement. The SI joints are not widened. Superior and inferior pubic rami fractures on the left with fracture extension into the pubic body. No widening of the symphysis pubis. The superior ramus fracture also extends into the anterior column of the acetabulum and the quadrilateral plate. The posterior column and wall are intact. Proximal femora are intact.
- left pubic rami fractures involving the acetabulum (Judet and Letournel simple anterior column type)
- left sacral ala fractures (Denis zone 1)