Microvascular tumor invasion, tumor size and fuhrman grade: a pathological triad for prognostic evaluation of renal cell carcinoma - Dall'Oglio, Marcos F; Ribeiro Filho, Leopoldo Alves; Antunes, Alberto A; Crippa, Alexandre; Nesrallah, Luciano; Gonçalves, Pierre D.; Leite, Kátia R. M.; Srougi, Miguel (The Journal of Urology, 2007)