A study of clinicopathological patterns of renal tumors among a Kurdish population in Kermanshah province, Western Iran

Introduction: Renal tumor is a serious public health problem which has been steadily increasing and varies in different regions. We purposed to check the clinicopathological features of renal tumors in Kermanshah (west of Iran). Materials and Methods: The population under this cross-sectional study consisted of 172 cases of histologically diagnosed renal tumors. Specimens were obtained from Imam Reza hospital in Kermanshah (west of Iran) between March 2008 and March 2017. Histological reports and frequency of different renal tumors were documented. Results: A total of 172 cases of renal tumors were collected that their mean age was 54.3 years. The frequency of renal cell carcinoma as the most common cell type was found to be 89.5%. The frequency of clear cell renal cell carcinoma (RCC), papillary RCC, and chromophobe RCC were 61%, 19.7%, and 8.2%, respectively. Other tumors included oncocytoma (5.8%), malignant lymphoma (2.3%), squamous cell carcinoma, Wilms tumor (1.2% from each), and sarcomatoid RCC (0.6%). The mean tumor size was 5.2 cm. Conclusions: The differences in the prevalence of renal cancer in the world maybe owing to differences in the distribution of risk factors, socioeconomic levels, early detection, and treatment availability. It is necessary to perform etiological studies to explore the risk factors for renal cancer in this region.