haidong, wang, Wang Jianwei, Li Guizhong, Liu Ning, He Feng, and Man Libo. 2014. “Ampullary Tumor Caused by Metastatic Renal Cell Carcinoma and Literature Review”. Urology Journal 11 (2):1504-7. https://doi.org/10.22037/uj.v11i2.1628.