Figure 1: Histological section from tumor documenting. (a) Dilated cystic spaces filled with blue secretions (H and E, ×200). (b) Tubules with secretory changes. (c) Cysts lined by flattened cells with hob nail like arrangement (H and E, ×100). (d) Areas of papillary renal cell carcinoma with high-grade nuclei (H and E, ×200).