Renal pseudotumors simulate a tumor on imaging but are composed of non-neoplastic tissue.
Differential diagnosis
There are many examples 1-3:
Developmental
Infectious and inflammatory
Vascular
-
renal hematoma
subepithelial pelvic hematomas (Antopol-Goldman lesions) 4
anticoagulant-induced subcapsular hemorrhage
Miscellaneous
regenerating nodule after reflux