Solitary tubercular renal cyst in a postpartum lady masquerading as an infected giant renal cyst with urosepsis.

Renal tuberculosis presenting as renal cyst is rare. Diagnosing renal tuberculosis in pregnancy is usually delayed due to its atypical presentation. We present a 28-year-old postpartum lady who delivered a healthy baby one month back, with history of intermittent fever and chills. She had high spiking fever (102° F), tachycardia (130/min) and computed tomography showed a 16 × 10 cm right renal cyst. Percutaneous drainage was done, 2 litres of thick pus drained and culture was sterile. After three weeks, deroofing and marsupialization of cyst was done. Biopsy revealed granulomatous inflammation composed of epitheliod histiocytes with central incipient necrosis suggestive of tuberculosis. She was treated with anti-tubercular drugs. As the infant was healthy and had no evidence of tuberculosis, no treatment was initiated. The mother is on follow up for 2 years. This case highlights the rare presentation of renal tuberculosis in puerperium.