A longer duration of fever, higher CRP level, and grade of pyuria were related with perirenal fat infiltration (p=0.010, p=0.003, and p=0.049, respectively).
[ncbi.nlm.nih.gov]
Pyuria was present in 147 patients (65.92%).
[academic.oup.com]
Early clinical manifestations were sudden onset of left flank pain, fever, hematuria and pyuria, and following admission, severe abdominal pain, nausea, vomiting, reduced
[ncbi.nlm.nih.gov]