A 54-year-old male patient complains of aching pain in the lumbar region, that is getting worse
after standing in an upright position, physical exercise, supercooling. The patient also reports of
experiencing weakness in the afternoon. Pain in the lumbar region, said about 10 years old.
Objectively: pale skin, to- 37,2oC, AP- 180/100 mm Hg, minor costovertebral angle
tenderness (Pasternatsky symptom). In blood: RBCs - 3,5x1012/l, WBCs - 6,5x109/l, ESR - 22 mm/h. In urine: the relative density - 1010, leukocytes - 12-15 in the field of vision, erythrocytes - 2-3 in the field of vision. Urine bacterial count - 100000 in 1 ml. What is the most likely diagnosis?
Select one of the following: