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Renal tuberculosis simulating xanthogranulomatous pyelonephritis with contagious hepatic involvement
Hemendra N Shah1, Pritesh Jain, Percy J Chibber
1J.J. Hospital and Grant Medical College, Urology, Mumbai, Maharashtra, India. drhemendrashah@yahoo.co.in
Summary
Xanthogranulomatous pyelonephritis (XGPN) can mimic renal tuberculosis, a serious kidney infection. This case highlights the diagnostic challenges, with tuberculosis misdiagnosed as XGPN, even spreading to the liver.
Area of Science:
- Nephrology
- Infectious Diseases
- Radiology
Background:
- Xanthogranulomatous pyelonephritis (XGPN) is a chronic renal infection often linked to kidney stones and non-functioning kidneys.
- Renal tuberculosis is a significant cause of illness, particularly in developing nations.
- Differentiating renal tuberculosis from XGPN preoperatively can be challenging despite diagnostic advancements.
Observation:
- A patient presented with a non-functioning right kidney due to renal calculus, with CT scans suggesting stage 3 XGPN and an adjacent liver abscess.
- The clinical presentation and imaging findings led to a preoperative diagnosis of XGPN.
Findings:
- Histopathological examination of the nephrectomized specimen confirmed renal tuberculosis, not XGPN.
- This case represents the first documented instance of renal tuberculosis spreading to the liver, forming an abscess.
Implications:
- The findings underscore the critical need for improved diagnostic accuracy in distinguishing XGPN from renal tuberculosis.
- Misdiagnosis can lead to inappropriate treatment and delayed management of tuberculosis, especially when it presents with unusual complications like liver abscesses.
- This case emphasizes the importance of considering tuberculosis in the differential diagnosis of complex renal masses and infections.
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