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. 2021 Oct 19;21:1124. doi: 10.1186/s12885-021-08821-5

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© The Author(s) 2021

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

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Fig. 4 — HRCT and pathological characteristics of a 55-year-old female patient with papillary-predominant adenocarcinoma. a CT image showed mGGN in the right lower lobe with spiculation, pleural indentation (black arrow) and bubble-like lucency (white arrow). The maximum diameter of GGN (Dmax) was measured. b CT image showed that the maximum diameter of solid component (Smax) was measured by adjusting window level and the window width (WL: -160HU; WD: 2HU). CTR = 47.5% (Smax/Dmax; 13.5 mm/28.4 mm). c Photomicrograph of histopathologic specimen showed a papillary pattern (black arrow) with cuboidal tumor cells growing along the surface of fibrovascular cores. Pulmonary vein was seen (white arrow). (Hematoxylin-eosin stain; original magnification, × 100)