Chronic Pyelonephritis

Chronic pyelonephritis is a long-lasting infection that affects the kidneys, which are vital organs responsible for filtering waste from the blood and producing urine. This condition causes repeated or persistent inflammation and scarring of the kidney tissue, leading to damage over time. It often results from untreated or recurrent urinary tract infections that travel up to the kidneys. People with this condition may experience symptoms like pain in the back or side, frequent urination, and sometimes fever. If left untreated, it can impair kidney function and lead to chronic kidney disease. The main concern is that the kidneys lose their ability to work properly, which can affect overall health.

Chronic pyelonephritis is a progressive renal disorder characterized by recurrent or persistent bacterial infection of the renal parenchyma and pelvis, leading to interstitial inflammation, fibrosis, and scarring. It commonly arises due to vesicoureteral reflux or chronic obstruction causing repeated episodes of infection, most often by Escherichia coli or other gram-negative bacteria. The hallmark pathological features include tubulointerstitial nephritis with cortical scarring and deformity of the renal calyces. Clinically, it presents with nonspecific symptoms such as flank pain, urinary frequency, and sometimes hypertension due to renal parenchymal damage. The condition is significant because it can cause progressive renal insufficiency and ultimately lead to end-stage renal disease if untreated.