A 58-year-old man complains of general weakness, loss of 10 kg of weight within 1,5 months, progressive pain in the lumbar region, increased blood pressure up to 220/160 mm Hg, low grade fever. Objectively: in the right hypochondrium deep palpation reveals a formation with uneven surface and low mobility; veins of the spermatic cord and scrotum are dilated. Blood test results: Hb- 86 g/l, ESR - 44 mm/h. Urine test results: specific gravity - 1020, protein - 0,99 g/l, RBC cover the whole field of vision, WBC- 4-6 in the field of vision. What is the provisional diagnosis?