What mean of pyelonephrolithiasis?

Pyelonephrolithiasis refers to the presence of kidney stones (nephrolithiasis) that lead to inflammation or infection of the kidney (pyelonephritis). This condition can occur when a stone obstructs the urinary tract, causing urine to back up and resulting in infection or damage to the kidney tissue. Symptoms may include flank pain, fever, and urinary changes. Effective treatment often involves addressing both the stones and the infection.