Renal tuberculosis presenting as a large perinephric mass

Tuberculosis (TB) infections most commonly affect the respiratory and genitourinary systems. In industrialized countries, between 8% and 10% of patients with pulmonary TB develop renal TB, and 15% to 20% of the population in developing countries have Mycobacterium tuberculosis cultured from the urine. Our patient exhibited an unusual case of renal TB presenting as a perinephric mass.