New Thoughts Concerning Xanthogranulomatous Pyelonephritis (X-P)

Association of Xanthogranulomatous Pyelonephritis with Small Renal Cell Carcinoma

“…The clinical and pathological features of XGP have been widely reported in previous studies [8,9,14,23]. The association of XGP and renal cell carcinoma has been rarely observed (table I) [6,10,14,17,22], In the present paper, we describe a recently encountered case of coexistent occurrence of XGP and small renal cell carcinoma, with emphasis on cytologic presenta tion.…”

“…The purpose of this study, however, is not to speculate on the histogenesis of XGP, which remains unresolved. The reader is directed to several articles which discuss this subject [8,11,16,18,25]. The main clinicopathological features of the present case are: ( 1 ) association XGP and renal carcinoma, as independent, spacially separate lesions; (2) small size of the renal neoplasm, and (3) presence of atypical cells in the urinary sediment, suspect of malignancy.…”

“…The xanthogranulomatous pyelonephritis (XGP) is a distinct type of renal infection, characterized by urinary calculus, obstructive uropathy or recurrent urinary infections (most commonly Proteus or Escherichia coli) and a vascular mass lesion often indistinguishable from a carcinoma [8,14]. The clinical and pathological features of XGP have been widely reported in previous studies [8,9,14,23].…”

Computed Tomography in Xanthogranulomatous Pyelonephritis

“…Both cases showed characteristic renal calculi on CT. This has been observed in up to 70% of XGP cases, but is rarely seen in renal carcinoma [3].…”

Xanthogranulomatous Pyelonephritis

“…The clinical, radiographic and pathologic findings are known from several reports pub lished in recent years [2,3,[6][7][8][9]. However, the pathogenesis has not yet been clarified.…”