title: Perirenal cobwebs: the expanding CT differential diagnosis.
abstract: Although initially described as representing collateral venous structures, perirenal cobwebs may be due to a variety of benign and malignant conditions. Six representative cases illustrating the broad differential diagnosis are presented.
mesh_terms: D000368:Aged; D002295:Carcinoma, Transitional Cell / Q000000981:diagnostic imaging; D003097:Collateral Circulation; D003937:Diagnosis, Differential; D005205:Fascia / Q000098:blood supply / Q000000981:diagnostic imaging* / Q000473:pathology; D005260:Female; D006801:Humans; D007668:Kidney / Q000098:blood supply / Q000000981:diagnostic imaging*; D007680:Kidney Neoplasms / Q000000981:diagnostic imaging; D008223:Lymphoma / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D009393:Nephritis / Q000000981:diagnostic imaging; D010195:Pancreatitis / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed