TP53 and clear cell adenocarcinoma: In two separate multivariate logistic regression analyses with Napsin A as endpoint both clear cell carcinoma with OR = 153 (95% C.I. 21–1107); (p < 001) and p21 + p53- status with OR = 5.36 (95% C.I. 1.6-17.5); (p = 0.005) were independent predictive factors.