Putty kidney
Putty kidney is a complication of renal tuberculosis characterized by extensive caseous material filling the entire pelvicalyceal system. It appears as a non-functioning, calcified kidney on imaging. The combination of sterile pyuria (pus cells in urine without bacterial growth on routine culture) and characteristic X-ray findings strongly suggests renal tuberculosis with putty kidney formation. Sterile pyuria is a classic finding in genitourinary tuberculosis.