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| Ultrasonographic Features of Focal Xanthogranulomatous Pyelonephritis |
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| Jong Chul Kim, M.D. . |
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| Department of Diagnostic Radiology, College of Medicine, Chungnam National University Hospital |
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| PURPOSE : To analyze ultrasonographic (US) features of focal xanthogranulomatous pyelonephritis
(XGP).
MATERIALS and METHODS : US features of 15 patients with pathologically proven focal XGP were
retrospectively analyzed by two radiologists who reached a consensus, in terms of the location,
margin, size, and echo texture of the mass-like lesion, and presence or absence of associated
calculi, lymphadenopathy, or local extension. These US findings were compared with CT findings.
The patients were checked for the clinical symptom and sign through the review of hospital
records.
RESULTS : Thirteen of 15 patients were adults and 2 were children, and 10 were males. Their age
ranged from 6 to 57 (mean, 39) years at presentation. Eight of 15 cases (53%) were in right
kidney, and on US scan 12 cases (80%) were well circumscribed. The size of the mass ranged
from 2.5 to 5.8 (mean, 3.8) cm. Of 15 masses, 13 (87%) were solid and two were cystic.
Thirteen solid masses were composed of 10 masses (77%) with inner hypo- or anechoic foci
and the other three masses without inner hypo- or anechoic foci, and the preoperative diagnosis
was either renal cell carcinoma (n=11) or Wilms’ tumor (n=2). The preoperative diagnosis in
two cystic lesions (13%) was renal abscess. Renal calculi were found in one case, but lymphadenopathy
or local extension was not depicted. Clinical symptoms and signs of flank pain,
fever, leukocytosis, or anemia were found in 11 of 15 patients.
CONCLUSION : Focal XGP revealed US features of solid or cystic masses confined within the renal
outline mimicking renal tumor or abscess. US features, however, in association with clinical
findings and other imaging findings (such as CT or MR imaging) may help the differential diagnosis
of this lesion. |
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| Keyword : Kidney, US Kidney, Inflammation Kidney, Diseases |
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pdf파일 : 125-132 김종철.pdf 
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> Journal > Journal Search 
Journal of Korean Society of Ultrasound in Medicine 2003 ; 22 (3) : p.125-132
