Arch Surg. 1938;36(2):225-244. doi:10.1001/archsurg.1938.01190200057003.
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In many of the articles and special treatises dealing with carcinoma of the breast no mention is made of the variety called comedo. In some instances such a tumor may have been described under another caption, but the description is not clear enough to justify one in believing that the author had in mind the type of lesion discussed here. There is undoubtedly confusion in the minds of some as to the significance of the term comedo. The point may be illustrated by quoting a statement accredited to one of the leading pathologists:1

Next we turn to the histological and anatomical varieties of duct carcinoma. Nearly all carcinomas of the breast arise from ducts. Duct carcinoma gives rise to a type of tumor which runs along the ducts and reproduces ducts, and for a long time shows a relation to and a respect for ducts. The types are the


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