[A case of pyonephrosis with septic shock in a hemodialysis patient treated successfully by retroperitoneal drainage].

A 56-year-old man on long-term hemodialysis was admitted to our hospital with complaints of right back pain and low-grade fever. Physical examination and laboratory data revealed severe hypotension and coagulopathy. Abdominal computed tomography showed a low dense area at the back of the right atrophic kidney. Under the clinical diagnosis of pyonephrosis spreading around the kidney with septic shock and disseminated intravascular coagulation, we performed drainage of retroperitoneal abscess. General condition improved postoperatively and right nephrectomy was performed two weeks after the drainage.