Ann Arbor, Mich., April 2, 1900.
To the Editor:
The concise statements made in the last two paragraphs of my paper on "Tumors of the Mammary Gland," in The Journal of March 31, admit of misinterpretation. My meaning is expressed more clearly as follows: The gross differential diagnosis of tumors of the breast in so far as the histologic variety is concerned is extremely uncertain and should not be taken as an operative guide. In a large proportion of cases it is not possible to distinguish the different forms. In nearly every case in which the histologic variety has been diagnosed in the gross, the microscopic examination has shown the diagnosis to be incorrect. The difficulty is obvious when the variety of pictures which one case may present is considered.It seems reasonable from the data afforded by these eighty cases that the percentage of malignant tumors of the breast