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. 2017 Oct 20;96(42):e7323. doi: 10.1097/MD.0000000000007323

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Copyright © 2017 the Author(s). Published by Wolters Kluwer Health, Inc.

This is an open access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License 4.0 (CCBY-NC-ND), where it is permissible to download and share the work provided it is properly cited. The work cannot be changed in any way or used commercially without permission from the journal. http://creativecommons.org/licenses/by-nc-nd/4.0

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Pictograms, CT images, and photopathologic features of various tumor borders. (A–C) Representative type 1, S or reverse S border with a blunt angle (arrow), in 80-y-old male with adenocarcinoma (arrows) invading of the elastic layer of the visceral pleura but without reaching the visceral pleural surface (PL1) (orcein stain, magnification ×40). (D–F) Type 2, sharp angle (arrow), in 54-y-old female with adenocarcinoma (arrows) invading the visceral pleural surface (PL2) (orcein stain, magnification ×40). (G–I) Type 3, concave border with a blunt angle (arrow), in 58-y-old male with adenocarcinoma (arrows) invading the elastic layer of the visceral pleura (PL1) (orcein stain, magnification ×40).