OBJECTIVE: To report a case of focalized stage II xanthogranulomatous pyelonephritis and the diagnostic difficulties encountered. METHODS: A 63-year-old female consulted at the emergency services for fever during the last two months and right lumbar pain. Urinary cultures were negative. A CT scan showed a poorly-defined heterogeneous mass in the lower pole of the right kidney. Fine needle punction-aspiration biopsy was compatible with renal cell carcinoma. The patient underwent radical nephrectomy. RESULTS: The histopathological study showed focalized stage II xanthogranulomatous pyelonephritis but no evidence of neoplasia. CONCLUSIONS: Xanthogranulomatous pyelonephritis can mimic the clinical, cytological and imaging features of renal neoplasia.
OBJECTIVE: To report a case of focalized stage II xanthogranulomatous pyelonephritis and the diagnostic difficulties encountered. METHODS: A 63-year-old female consulted at the emergency services for fever during the last two months and right lumbar pain. Urinary cultures were negative. A CT scan showed a poorly-defined heterogeneous mass in the lower pole of the right kidney. Fine needle punction-aspiration biopsy was compatible with renal cell carcinoma. The patient underwent radical nephrectomy. RESULTS: The histopathological study showed focalized stage II xanthogranulomatous pyelonephritis but no evidence of neoplasia. CONCLUSIONS:Xanthogranulomatous pyelonephritis can mimic the clinical, cytological and imaging features of renal neoplasia.
Authors: Catarina Granjo Morais; Sara Gomes; Ana Catarina Fragoso; Janine Coelho; Joana Jardim; João Luís Barreira; Irene Pinto-Carvalho; Helena Pinto Journal: J Investig Med High Impact Case Rep Date: 2022 Jan-Dec