There are many types and causes of head injury, but, by far, the most common are concussions related to motor vehicle accidents and contact sports. Concussion comes from the Latin âConcutereâ, which means to shake violently.
Noun. 1. pyelonephritis-inflammation of the kidney and its pelvis caused by bacterial infection. urinary tract infection-any infection of any of the organs of the urinary tract. acute pyelonephritis-pyelonephritis resulting from the spread of a bladder infection.
Causes of Pyelonephritis: The following medical conditions are some of the possible causes of Pyelonephritis. There are likely to be other possible causes, so ask your doctor about your symptoms. 1  Ureter abnormality.  Bladder abnormality.