Evaluation of renal masses considered indeterminate on computed tomography.

Abstract

Of 815 renal masses studied by computed tomography (CT), 60 did not fit the criteria for cyst or neoplasm and thus were called indeterminate. When artifacts were present, the likely diagnosis was a simple cyst; when no artifacts were present to explain atypical features in cyst-like masses, further investigation was necessary. Angiography was useful in only 16%, while ultrasound combined with cyst aspiration was diagnostic in 84%. All solid lesions required surgical investigation. Ultrasound with or without aspiration is recommended for all cyst-like renal masses thought to be indeterminate on CT.

Small (< or = 3 cm) renal masses: correlation of spiral CT features and pathologic findings.

“…Despite the emergence of CT as the primary imaging tool for the detection and characterization of renal masses [1][2][3][4][5] Two lesions that contained several septations were visualized on spiral CT as solid lesions (Fig. 6).…”

Ultrasonographic and Computed Tomography Findings in Renal Suppurations: Performance Indicators and Risks for Diagnostic Failure

“…It has been re-ported that as many as 5% of renal masses detected on CT scans are of an indeterminate nature and require further evaluation [32] . Association of renal cell carcinoma with a renal or perinephric abscess and of obstructing transitional cell carcinoma with pyonephrosis has been well established in the published reports [33][34][35] .…”

Simultaneous Diagnosis of a Metanephric Adenoma and a Clear Cell Carcinoma of the Contralateral Kidney

“…renal cell carcinomas, metastases) and benign (e.g. renal cysts, multicystic kidneys, xanthogranulomatous pyelonephritis) conditions [13, 14]. Balfe et al [13]evaluated renal masses considered indeterminate on CT.…”

“…renal cysts, multicystic kidneys, xanthogranulomatous pyelonephritis) conditions [13, 14]. Balfe et al [13]evaluated renal masses considered indeterminate on CT. According to the authors, neoplasm should be diagnosed if (a) the calcification does not form a border and (b) attenuation is higher than that of urine and closer to the density of parenchyma.…”