The Teaching Point

Xanthogranulomatous Pyelonephritis (XGP) is a rare entity that usually occurs in immunocompromised middle-aged females with ureteral obstruction or chronic urinary tract infection induced by the formation of renal stones. Imaging plays a significant role in assessing disease extension and associated complications. CT findings in XGP include multiloculated low-density rounded areas throughout the enlarged kidney (bear`s paw sign). XGP MRI features include hyperintense (or isointense) appearance of the solid component and hypointense cavity fluid on T1-weighted images. The administration of contrast material can reveal strong rim enhancement of the borders. Without treatment, XGP can become a life-threatening disease. Thus, the usual management is nephrectomy.






Bookmark and Share

From the manuscript

Bear Paw Sign: Xanthogranulomatous Pyelonephritis

Free full text article: Bear Paw Sign: Xanthogranulomatous Pyelonephritis

Abstract
Xanthogranulomatous pyelonephritis is a rare form of chronic pyelonephritis in which the involved areas of the kidneys are destroyed and replaced by foam cells. It usually occurs in immunocompromised middle-aged females with ureteral obstruction or chronic urinary tract infection induced by the formation of renal stones. We herein report the case of a 44-year-old woman, with a history of left kidney staghorn calculi and recurrent urinary tract infections. Abdominal computed tomography showed the `bear paw` sign, typical appearance of XGP and patient underwent a nephrectomy with uneventful post-operative course.






References



1. Ghoz HM, Williams M, Perepletchikov A, James N, Babeir AA. An unusual presentation of xanthogranulomatous pyelonephritis: psoas abscess with reno-colic fistula. Oxf Med Case Reports 2016;2016(7):150-3
Get full text
Find similar topics on Read this article on PubMed :: Find similar articles on Google scholarScholar :: Search for similar topics with the Radiology specific search engine Radiology search engine


2. Zugor V, Scott GE, Labanaris AP. Xanthogranulomatous Pyelonephritis in Childhood: A critical analysis of 10 cases and of the literature. Urology 2007;70(1): 157-60
Get full text
Find similar topics on Read this article on PubMed :: Find similar articles on Google scholarScholar :: Search for similar topics with the Radiology specific search engine Radiology search engine


3. Alan C, Ataus S, TunÁ B. Xanthogranulamatous pyelonephritis with psoas abscess: 2 cases and review of the literature. Int Urol Nephrol 2004;36(4):489-93
Get full text
Find similar topics on Read this article on PubMed :: Find similar articles on Google scholarScholar :: Search for similar topics with the Radiology specific search engine Radiology search engine


4. Malek RS, Elder JS. Xanthogranulomatous pyelonephritis: a critical analysis of 26 cases and of the literature. J Urol 1978;119(5):589-93
Get full text
Find similar topics on Read this article on PubMed :: Find similar articles on Google scholarScholar :: Search for similar topics with the Radiology specific search engine Radiology search engine


5. Chuang CK, Lai MK, Chang PL. Xanthogranulomatous pyelonephritis: experience in 36 cases. J Urol 1992;147(2):333-336
Get full text
Find similar topics on Read this article on PubMed :: Find similar articles on Google scholarScholar :: Search for similar topics with the Radiology specific search engine Radiology search engine


6. Craig WD, Wagner BJ, Travis MD. Pyelonephritis: radiologic-pathologic review. Radiographics 2008;28(1):255-77
Get full text
Find similar topics on Read this article on PubMed :: Find similar articles on Google scholarScholar :: Search for similar topics with the Radiology specific search engine Radiology search engine


7. Onn LV, Bickle I, Chua HB, Telisinghe PU, Chong CF, Chong VH. Xanthogranulomatous pyelonephritis with reno-colic fistula: A rare complication of urinary tract infection. Malays Fam Physician 2017;12(3):33-36
Get full text
Find similar topics on Read this article on PubMed :: Find similar articles on Google scholarScholar :: Search for similar topics with the Radiology specific search engine Radiology search engine


8. Dani R D, Gandhi V S, Prajapati H J, Shah P, Raval H, Rathod G D. Case report: Xanthogranulomatous pyelonephritis - an unusual variety. Indian J Radiol Imaging 2005;15:195-8
Get full text
Find similar topics on Read this article on PubMed :: Find similar articles on Google scholarScholar :: Search for similar topics with the Radiology specific search engine Radiology search engine


9. Verswijvel G, Oyen R, Van Poppel H, Roskams T. Xanthogranulomatous pyelonephritis: MRI findings in the diffuse and the focal type. Eur Radiol 2000;10(4):586-9
Get full text
Find similar topics on Read this article on PubMed :: Find similar articles on Google scholarScholar :: Search for similar topics with the Radiology specific search engine Radiology search engine


10. Reiter M, Schwope R, Clarkson A. Sarcomatoid renal cell carcinoma: a case report and literature review. J Radiol Case Rep 2012;6(4):11-6
Get full text
Find similar topics on Read this article on PubMed :: Find similar articles on Google scholarScholar :: Search for similar topics with the Radiology specific search engine Radiology search engine


11. Goldsmith S, Harris M, Scherer K, Al-Quran S, Vorhis E. Sarcoidosis manifesting as a pseudotumorous renal mass. J Radiol Case Rep 2013;7(5):23-34
Get full text
Find similar topics on Read this article on PubMed :: Find similar articles on Google scholarScholar :: Search for similar topics with the Radiology specific search engine Radiology search engine


12. Merchant S, Bharati A, Merchant N. Tuberculosis of the genitourinary system-Urinary tract tuberculosis: Renal tuberculosis-Part II. Indian J Radiol Imaging 2013;23(1):64-77
Get full text
Find similar topics on Read this article on PubMed :: Find similar articles on Google scholarScholar :: Search for similar topics with the Radiology specific search engine Radiology search engine


13. Siegel CL, Middleton WD, Teefey SA, McClennan BL. Angiomyolipoma and renal cell carcinoma: US differentiation. Radiology 1996;198(3):789-93
Get full text
Find similar topics on Read this article on PubMed :: Find similar articles on Google scholarScholar :: Search for similar topics with the Radiology specific search engine Radiology search engine


14. Dedekam E, Graham J, Strenge K, Mosier AD. Primary renal lymphoma mimicking a subcapsular hematoma: a case report. J Radiol Case Rep 2013
Get full text
Find similar topics on Read this article on PubMed :: Find similar articles on Google scholarScholar :: Search for similar topics with the Radiology specific search engine Radiology search engine


15. Ho CI, Wen YK, Chen ML. Xanthogranulomatous pyelonephritis successfully treated with antibiotics only. J Chin Med Assoc 2008 Dec;71(12):643-5
Get full text
Find similar topics on Read this article on PubMed :: Find similar articles on Google scholarScholar :: Search for similar topics with the Radiology specific search engine Radiology search engine


16. Hayashi Y, Kawahara T, Hattori Y. Xanthogranulomatous Pyelonephritis with Incomplete Double Ureter. Case Rep Med 2017;2017:2392670
Get full text
Find similar topics on Read this article on PubMed :: Find similar articles on Google scholarScholar :: Search for similar topics with the Radiology specific search engine Radiology search engine


17. Bourm KS, Menias CO, Ali K, Alhalabi K, Elsayes KM. Spectrum of Xanthogranulomatous Processes in the Abdomen and Pelvis: A Pictorial Review of Infectious, Inflammatory, and Proliferative Responses. AJR Am J Roentgenol 2017;208(3):475-484
Get full text
Find similar topics on Read this article on PubMed :: Find similar articles on Google scholarScholar :: Search for similar topics with the Radiology specific search engine Radiology search engine


18. Yang JH, Shin JY, Roh SG, Chang SC, Lee NH. Delayed diagnosis of xanthogranulomatous pyelonephritis in a quadriplegic patient with uncontrolled cutaneous fistula: A case report. Medicine (Baltimore) 2018;97(2):e9659
Get full text
Find similar topics on Read this article on PubMed :: Find similar articles on Google scholarScholar :: Search for similar topics with the Radiology specific search engine Radiology search engine


19. Friedl A, Tuerk C, Schima W, Broessner C. Xanthogranulomatous Pyelonephritis with Staghorn Calculus, Acute Gangrenous Appendicitis and Enterocolitis: A Multidisciplinary Challenge of Kidney-Preserving Conservative Therapy. Curr Urol 2015 Sep;8(3):162-5
Get full text
Find similar topics on Read this article on PubMed :: Find similar articles on Google scholarScholar :: Search for similar topics with the Radiology specific search engine Radiology search engine




Search for articles with similar topics:

Keyword search:

1. Xantogranulomatous

2. Pyelonephritis

3. Urinary stone

4. Complication

5. Computed Tomography


This article belongs to the GU section.


Search for more in the Internet

Peer-reviewed Radiology Search




Discuss it!

Bookmark and Share




© Journal of Radiology Case Reports - The Interactive Radiology Journal
Affiliated journal of Radiolopolis - The International Radiology Community


The Journal of Radiology Case Reports