Papillary renal cell carcinoma (PRCC), a histological subtype of
renal cell carcinoma (RCC), accounts for approximately 10% of all RCC. Here, we
report a case of metastatic RCC diagnosed unexpectedly in a 31-year-old
female patient. Computed
tomography revealed a renal
abscess in the left
kidney and the
urine culture confirmed
Escherichia coli producing extended-spectrum
beta-lactamase. Despite appropriate
antibiotic treatment for 2 months, the
patient's symptoms and radiological findings worsened and she underwent
nephrectomy. Pathological examination confirmed type 2 PRCC and a further staging study found stage 4 (T3N1M1). Our findings indicate that
malignancy should be considered in young
patients with a bacteriologically confirmed
urinary tract infection.