An unusual presentation: renal tuberculosis.

Genitourinary tuberculosis (TB) is the second most common form of extrapulmonary TB after peripheral lymphadenopathy. We report the case of a 44-year-old woman referred for hydronephrosis discovered on ultrasound performed due to flank pain. Contrast computed tomography (CT) scan demonstrated a well-circumscribed cystic mass with enhancing septations at the inferior pole of the right kidney, concerning for malignancy. Following extirpative surgery, she was diagnosed with renal TB.