Psoas abscesses are rarely encountered with various etiologies and nonspecific clinical presentation, frequently resulting in delayed diagnosis, with increased morbidity and mortality. They are divided into primary when the origin is not found and secondary when a focus for infection spreading is detected. Herein, an unusual case of venous thrombosis and a psoas abscess, complicated by a renal subcapsular abscess, is reported in a diabetic patient. A 60-year-old female presented with fever and generalized weakness of 1 week duration. She had been diagnosed with diabetes 6 years earlier, but had only received intermittent oral antidiabetic agents. Abdominal sonography and CT showed a left renal subca-psular abscess and a right psoas abscess. A percutaneous drainage catheter was inserted and IV antibiotic was started immediately. Both cultures of the pus and urine showed K. pneumoniae. During treatment, the patient developed a right femoral vein thrombosis.