A 56-year-old man has been suffering from bronchiectasis for 18 years. For the last half a year the expressed hypostases of shins, the person are observed. In the proteinogramindicated: total protein - 52 g/l, albumin-globulin ratio - 0.7, α2-globulins - 14%, β-globulins - 17%, γ-globulins - 24 g/l. ESR - 52 mm/year. Daily proteinuria - 4.5 g ECG: sinus tachycardia. Which disease is most likely?