An ossifying fibroma of the middle ear.
D003036:Cobalt Isotopes / Q000627:therapeutic use; D004428:Ear Neoplasms; D004432:Ear, Middle; D005260:Female; D005350:Fibroma; D006801:Humans; D008875:Middle Aged; D011867:Radioisotope Teletherapy
D003036:Cobalt Isotopes