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Scrotal Fibrous Pseudotumor

History: 55 year old male with incidental lump in his scrotum.  The imaging here is essentially diagnostic of scrotal fibrous pseudotumor, particularly, the marked hypointensity on T2W MR imaging. A scrotal fibrous pseudotumor typically arises from the tunica albuginea or vaginalis and can break free to form a “scrotal mouse.”