Objective: To review the pathologic fin-dings of a contemporary series of surgically treated renal tumors suspicious for malignancy to assess the frequency of benign disease and treatment modality.
Materials and Methods: The records of 188 patients (120 male, 68 female) underwent sur-gery for suspicious renal mass for malignancy between February 2005 and December 2010 were reviewed retrospectively.
Results: Of 188 cases, records of a total of 178 cases were available for analysis. 142 pati-ents underwent radical nephrectomy (79%), 28 nephron sparing surgery (15%), 4 renal biopsy (3%) and 4 nephroureterectomy (3%). Of 178 tumors, 66 (37%) were discovered incidentally. Forty three (66%) of incidentally diagnosed re-nal masses size were less than 7 cm. The pat-hologic evaluation demonstrated malignancy in 156 (88%) and benign disease in 22 (12%). Benign masses were oncocytoma (n=11), an-giomyolipoma (n=6), cystic nephroma (n=2), xanthogranulomatous pyelonephritis (n=2) and metanephric adenoma (n=1). Of 91 renal masses with size of less than 7 cm, 22 (24%) had benign pathology and none of benign masses were bigger than 7 cm.
Conclusion: Inspite of great technological development in the radiological imaging mo-dalities, benign lesions may still be detected pathologically in the patients with preoperative diagnosis of renal cancer. Nephron sparing sur-gery should be kept in mind for the renal mas-ses less than 7 cm, if possible.
Key Words: Benign pathology, renal mass, nephron sparing surgery
Abstract
Objective: To review the pathologic fin-dings of a contemporary series of surgically treated renal tumors suspicious for malignancy to assess the frequency of benign disease and treatment modality.
Materials and Methods: The records of 188 patients (120 male, 68 female) underwent sur-gery for suspicious renal mass for malignancy between February 2005 and December 2010 were reviewed retrospectively.
Results: Of 188 cases, records of a total of 178 cases were available for analysis. 142 pati-ents underwent radical nephrectomy (79%), 28 nephron sparing surgery (15%), 4 renal biopsy (3%) and 4 nephroureterectomy (3%). Of 178 tumors, 66 (37%) were discovered incidentally. Forty three (66%) of incidentally diagnosed re-nal masses size were less than 7 cm. The pat-hologic evaluation demonstrated malignancy in 156 (88%) and benign disease in 22 (12%). Benign masses were oncocytoma (n=11), an-giomyolipoma (n=6), cystic nephroma (n=2), xanthogranulomatous pyelonephritis (n=2) and metanephric adenoma (n=1). Of 91 renal masses with size of less than 7 cm, 22 (24%) had benign pathology and none of benign masses were bigger than 7 cm.
Conclusion: Inspite of great technological development in the radiological imaging mo-dalities, benign lesions may still be detected pathologically in the patients with preoperative diagnosis of renal cancer. Nephron sparing sur-gery should be kept in mind for the renal mas-ses less than 7 cm, if possible.
Key Words: Benign pathology, renal mass, nephron sparing surgery