Keywords: hemodialysis, steroid therapy, prostatic abscess, drainage, pyuria 〈Abstract〉 A man in his 70s with anti glomerular basement membrane disease required hemodialysis and received corticosteroid therapy. Hemodialysis was discontinued after 8 weeks. About 9 weeks after discontinuation, the patient experienced disturbance of consciousness which improved after a few days. However, he subsequently showed fever, urinary retention, re elevation of C reactive protein, and persistent pyuria. Computed tomography indicated rupture of a prostatic abscess into the retroperitoneal space. Escherichia coli was identified in urine and blood culture samples. The prostatic abscess, including pyuria, was treated with transrectal ultrasound guided transperineal percutaneous drainage and antibiotic therapy. Risk factors for prostatic abscess in our patient included an immunosuppressive state, hemodialysis, and oliguria. Although he began to show pyuria with