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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
PET-CT of an 80-year old male showing massive melanoma metastases in the entire abdomen (a), which almost completely resolved after two cycles of anti-PD-1 plus an-ti-CTLA-4 combination therapy (b).