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Incidence and Predictive Factors of Benign Renal Lesions in Korean Patients with Preoperative Imaging Diagnoses of Renal Cell Carcinoma
Journal of Korean Medical Science ; : 360-364, 2011.
Article in English | WPRIM | ID: wpr-52139
ABSTRACT
The present study was performed to determine the incidence and predictive factors of benign renal lesions in Korean patients undergoing nephrectomy for presumed renal cell carcinoma on preoperative imaging. We analyzed the pathologic reports and medical records of 1,598 eligible patients with unilateral, nonmetastatic, and nonfamilial renal masses. Of the 1,598 renal masses, 114 (7.1%) were benign lesions, including angiomyolipoma in 47 (2.9%), oncocytoma in 23 (1.4%), and complicated cysts in 18 (1.1%) patients. On univariate analysis, the proportion of benign lesions was significantly higher in female patients, and in patients with smaller tumors, cystic renal masses, and without gross hematuria as a presenting symptom. When renal lesions were stratified by tumor size, the proportion of benign as opposed to malignant lesions decreased significantly as tumor size increased. On multivariate analysis, female gender, smaller tumor size, and cystic lesions were significantly associated with benign histological features. The findings in this large cohort of Korean patients show a lower incidence (7.1%) of benign renal lesions than those of previous Western reports. Female gender, cystic renal lesions, and smaller tumor size are independent predictors of benign histological features.
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Full text: Available Index: WPRIM (Western Pacific) Main subject: Diagnostic Imaging / Carcinoma, Renal Cell / Retrospective Studies / Cohort Studies / Angiomyolipoma / Cysts / Republic of Korea / Hematuria / Kidney Neoplasms / Nephrectomy Type of study: Diagnostic study / Etiology study / Incidence study / Observational study / Prognostic study / Risk factors Limits: Adolescent / Adult / Aged / Aged80 / Child / Female / Humans / Male Country/Region as subject: Asia Language: English Journal: Journal of Korean Medical Science Year: 2011 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Main subject: Diagnostic Imaging / Carcinoma, Renal Cell / Retrospective Studies / Cohort Studies / Angiomyolipoma / Cysts / Republic of Korea / Hematuria / Kidney Neoplasms / Nephrectomy Type of study: Diagnostic study / Etiology study / Incidence study / Observational study / Prognostic study / Risk factors Limits: Adolescent / Adult / Aged / Aged80 / Child / Female / Humans / Male Country/Region as subject: Asia Language: English Journal: Journal of Korean Medical Science Year: 2011 Type: Article