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. 2016 Jun 8;16:14. doi: 10.1186/s40644-016-0072-6

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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. 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.

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Fig. 4 — ⁶⁸Ga-PSMA ligand PET/CT examination of a 76-year old patient after radical prostatectomy (Gleason score 8, pT2b, pN1) followed by subsequent external beam radiation. 5 years later the patient presented with a rising PSA-value of 0.54 ng/ml. CT images show a 10 × 8 mm soft tissue formation in the former left prostatic bed a and a morphologically unsuspicious 4 mm lymph node (short axis) d dorsal of the right external iliac vein. Corresponding PET and fused PET/CT images show an intense, focal PSMA-ligand uptake in the former left prostatic bed b, c indicating a local recurrence as well as an intense, focal PSMA-ligand uptake in the small-sized lymph node dorsal of the right external iliac vein e, f indicating a lymph node metastasis