The answer to the last Diagnostic Dilemma (A 45-year-old man presented to the emergency department after a motorcycle accident. Physical examination was notable for a bruise in the pubic area and severe pain in the anterior and posterior pelvic areas with manual compression. What is the diagnosis?) is A. Open-book fracture
A radiograph of the pelvis showed a widening of the pubic symphysis of more than 5 cm, also known as an open-book fracture. This injury typically occurs after high-energy blunt trauma.