Focal xanthogranulomatous pyelonephritis: success of conservative treatment. A case report.
BACKGROUND
Focal xanthogranulomatous pyelonephritis is an atypical form of chronic renal infection. It is frequently misdiagnosed preoperatively because of its resemblance to malignancy.


METHODS
We report on a fifty-year-old woman who presented with a right kidney mass. The CT scan showed a solid renal mass with a lithiasis of the upper ureter. The diagnosis of focal xanthogranulomatous pyelonephritis was suspected by clinical and radiological findings and confirmed by histopathologic examination of percutaneous biopsy specimens of the lesion. Successful treatement of the patient was achieved with removal of the lithiasis and antibiotic therapy during eight weeks. Three months later the CT scan was completely normal.


CONCLUSIONS
The conservative treatment of focal xanthogranulomatous pyelonephritis makes possible to avoid a needless nephrectomy usually on young patients. However a close follow-up must be undergone on these patients because of the possible association of focal xanthogranulomatous pyelonephritis and renal cell carcinoma of the kidney.
Fitouri
Zouheir
Z
Department of Urology, La Rabta hospital, Tunis, Tunisia.
Nouira
Yassine
Y
Nouira
Kaïes
K
Sallami
Sataa
S
Hmidi
Mohamed
M
El Fekih
Nizar
N
Horchani
Ali
A
D005260:Female; D006801:Humans; D008875:Middle Aged; D011705:Pyelonephritis, Xanthogranulomatous / Q000628:therapy*; D012074:Remission Induction