Many personal injury cases involve serious injuries, and in some cases, wrongful death. Broken or fractured bones can result from any type of accident. Although it may not seem like a severe injury, the medical bills and rehabilitation treatments can be lengthy and expensive. Head trauma is another type of injury that is not always noticeable until days after the accident. Dizziness, loss of memory, headaches, and nausea could all point to a brain injury. If left untreated, it can lead to permanent disability. The worst injuries are classified as catastrophic injuries. These include amputation, quadriplegia, paraplegia, and brain damage.