Intraosseous meningioma: appearance on bone scintigraphy over five years.

While meningiomas are common intradural tumors, such lesions only rarely arise outside of the meninges. All meningiomas, however, may slowly enlarge causing concern for malignancy. We report the appearance of an intraosseous meningioma in the patient with a history of breast carcinoma where the lesion progressively enlarged over a period of 5 yr to reach approximately three times the original size.