A 43-year-old patient had been admitted to a hospital with clinical presentations of ischiorectal periproctitis. On the 12th day of treatment the patient's condition deteriorated: there was an increase in the rate of intoxication and hepatic failure, the body temperature became hectic, AP was 100/60 mm Hg. USI of liver revealed a hydrophilic formation. In blood: WBCs - 19,6 × 109/l, RBCs.-3,0 × 1012/l, Hb- 98 g/l. What complication was developed?