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. 2022 May 27;14(11):2668. doi: 10.3390/cancers14112668

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© 2022 by the authors.

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/).

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A large rectal carcinoid tumor before (a) and after (b) treatment with Imatinib. Fused axial PET-CT images of the low pelvis show a significant decrease in metabolic activity with treatment. Urinary bladder is shown by white arrow.