Clinically, an osteoma of the cranial surface may sometimes closely simulate a hyperostosis produced by a meningeal fibroblastoma (dural endothelioma, meningioma). The importance of distinguishing between these two lesions, so different in their ultimate results, lends intrigue to an already interesting study.
In the recent literature considerable attention has been given to hyperostoses resulting from infiltration of the skull by meningeal fibroblastomas. From a clinical and operative point of view, this attention has also been extended to osteomas about the frontal sinus1 and orbit.1a A study of osteomas of the external surface of the cranium, however, would appear to have been largely neglected. Judging from the material in this laboratory, the latter osteomas occur almost as frequently as clinically recognizable hyperostoses cranii produced by meningeal tumors.
An attempt shall be made in this paper to explain the true nature of osteomas of the external surface of the cranium
ECHLIN F. CRANIAL OSTEOMAS AND HYPEROSTOSES PRODUCED BY MENINGEAL FIBROBLASTOMAS: A CLINICAL PATHOLOGIC STUDY. Arch Surg. 1934;28(2):357–405. doi:10.1001/archsurg.1934.01170140137009
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