To the Editor.—
Drs Maroon and Kennerdell (Archives 1981;38:326) have taken issue with the description by myself and my colleagues (Archives 1980;37:781-783) of their report "Microsurgical Removal of a Primary Intraorbital Meningioma," published in the American Journal of Ophthalmology.1 In their letter in the Archives, they asserted that "the dura was indeed identified, that the tumor was separated from the dura, and that this was clearly an optic nerve sheath tumor." I am puzzled by their comments: the following excerpts from their report speak for themselves.During surgery "a plane between tumor and nerve was found.... No dural tissue could be identified on multiple cut sections." The last paragraph of the report states, "Although dural tissue could not be identified histopathologically, suggesting that this tumor arose outside the sheath, purely etopic [sic] meningiomas are rare.... Because of this, we acknowledge the possible fortuitous nature of