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. 2016 Oct 13;122(1):53–60. doi: 10.1007/s11547-016-0695-5

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© The Author(s) 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 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.

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Fig. 2 — Radiation-induced osteosarcoma 17 years after radiotherapy of a 58-year-old man. a Axial contrast-enhanced CT image showed a large heterogeneous tumor in the right maxillary sinus invading the nasal cavity (arrows); b axial T2-weighted image showed heterogeneously high T2 signal intensity of the tumor; c coronal T1-weighted contrast-enhanced image showed the mildly enhanced tumor with wide invasion into the right maxillary region (arrows)