Analysis of 39 Cases of Xanthogranulomatous Pyelonephritis with Emphasis on CT Findings

Abstract

Nephrectomy for XGP may be followed by severe complications and appropriate patient preparation and operation planning is of great importance. CT is considered the imaging technique of choice for diagnosing the disease preoperatively and a plethora of CT characteristics have been described to date. Low-density fluid-filled areas within the renal parenchyma and findings indicating perinephric extension should be considered the most typical CT features of XGP.

Xanthogranulomatous pyelonephritis in a renal allograft associated with xanthogranulomatous diverticulitis: report of the first case and review of the literature

“…Common organisms associated with this entity are E. coli, Proteus mirabilis, Pseudomonas, Streptococcous fecalis and Klebsiella [3]. Urinary tract obstruction, urinary calculi and previous ineffective antibiotic treatment are predisposing factors, whereas chronic renal ischaemia, lymphatic blockade and altered immunologic competence have been reported to have aetiologic roles [2]. The disease in native kidneys is generally unilateral and diffuse.…”

“…XGP is characterized by focal or diffuse replacement of renal parenchyma by granulomatous tissue containing lipid filled macrophages [1]. XGP has been found in 0.6-4% of the surgically proven cases of chronic pyelonephritis in the general population [2]. It usually occurs in association with urinary obstruction, calculus disease and chronic infection.…”

Cystic renal mass in a patient with previous Wilm's tumour

“…In this case, making a diagnosis of XGPN based on imaging was challenging owing to the absence of visible obstruction or calcification, findings that are usually present in this disease [1][2][3]. There was no history of urinary tract infection or stones, and the coliform cultured from her urine had given no symptoms.…”

El signo de la "pata de oso" En TC

“…Este signo se describe en TC y es considerado característico de la pielonefritis xantogranulomatosa (PXG) (1) . …”

“…Con este método es posible evaluar además la presencia de complicaciones, como fístulas o abscesos, como se aprecia en la Figura 4 (1,2,7) .…”