pyelitis Inflammation of the pelvis of the kidney, where urine collects before draining into the ureter. More common in women, it is usually caused by bacterial infection. Treatment is with antibiotics and copious fluids.

pyelitis (py-ĕ-ly-tis) n. inflammation of the pelvis of the kidney, usually caused by a bacterial infection. The patient experiences pain in the loins, shivering, and a high temperature. Treatment is by the administration of a suitable antibiotic, together with analgesics and a high fluid intake.