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. 2019 Jun 11;9:8499. doi: 10.1038/s41598-019-44735-w

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© The Author(s) 2019

Open Access This 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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Association between the type of DBF pattern and the lymph flow pathway in the unaffected limbs. (a) Cases in which the lymph nodes around the clavicle were positive. In total, 51 cases out of 98 had a ‘superficial dominant’ type of lymph flow, while the others had a ‘complex’ type of lymph flow. (b) Cases in which the lymph nodes around the clavicle were negative. Lymph nodes around the clavicle were not observed in two cases on the single photon emission computed tomography-computed tomography lymphoscintigraphy (SPECT-CT LSG) images in the unaffected upper limb. The superficial pathway was dominant in one case, whereas the deep pathways were as active as the superficial pathways in the other case. None of the cases were classified as having ‘deep dominant’ lymph flow.