예상하기 어려운 원발 병소로 치료가 지연된 이차성 요근 농양.

For a secondary psoas abscess, it is essential to find the primary lesion and treat them together. Any delay in diagnosis and treatment for the primary lesion has a risk of increased morbidity and mortality. This paper reports a case in which a secondary psoas abscess occurred due to pyelonephritis of the residual kidney combined with a fistula of the ureter and duodenum in a patient who underwent partial nephrectomy 10 years earlier, but the diagnosis and treatment of the primary lesion were delayed. [ABSTRACT FROM AUTHOR]