Emphysematous prostatitis combined with a liver ab scess caused by Klebsiella pneumoniae Emphysematous prostatitis is a rare condition that is characterized by gas and abscess accumulation in the prostate. This uncommon but serious disease requires special attention because of its nonspecific presentation such as dysuria, frequency, urgency, fever, acute urinary retension and/or perineal pain. We report here on a case of emphysematous prostatitis that was combined with a liver abscess caused by Klebsiella pneumoniae. A 55yearold man was admitted due to a 3day history of urinary retention with a febrile sensation. He had histories of liver cirrhosis and uncontrolled diabetes mellitus. After blood and urine cultures, levofloxacin 500 mg was started intravenously. On the third hospital day, he displayed septic shock.The kidneysureters bladder (KUB) Xray showed pockets of airaccumulation in the lower pelvic cavity, and abdominopelvic computed tomography (CT) with contrast enhancement taken on the third day showed a 5cm liver abscess with an emphysematous prostate. Intravenous antibiotics was changed to metronidazole 500 mg q.i.d. and cefotaxime 2 g t.i.d. On the sixth day, transurethral resection and drainage were performed under spinal anesthesia. However, the postoperative bleeding continued and hypovolemic shock persisted, which then provoked multiorgan failure. The patient died on the 11th hospital day. K. pneumoniae was cultured from the liver abscess aspirate, blood and prostatic tissue, and the bacteria were sensitive to both levofloxacin and cefotaxime. Emphysematous prostatitis is a difficult to diagnose because of its rarity and nonspecific symptoms. A delayed diagnosis can cause high mortality and morbidity, so making a prompt clinical diagnosis of this condition is essential. Appropriate antibiotics with early adequate incision and drainage are also needed.