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.
chronic pyelonephritis-pyelonephritis that develops slowly and can lead to renal failure if untreated; often associated with a kidney stone or with narrowing of the urinary passageways. Translations.