Fluid collections around the kidney.
D000293:Adolescent; D000328:Adult; D000368:Aged; D001826:Body Fluids / Q000032:analysis*; D005205:Fascia / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D007668:Kidney / Q000032:analysis* / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D011859:Radiography