[Giant cell tumour of bone in the cavum tympani and petrous bone].

In the great majority of cases, the giant-cell tumour of bone (synonymous with osteoclastoma of bone) is localised at the end of a long tubular bone. Most of the patients are between 20 and 40 years of age. A case of a grade II giant-cell tumour in a female patient of 32 years of age is reported, which was localised in the middle ear and petrous bone.