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. 2021 Oct 30;13(21):5459. doi: 10.3390/cancers13215459

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© 2021 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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Chemical structure of (A) thymidine, ¹⁸F-FLT, and ¹⁸F-FMAU; (B) ¹⁸F-FLT PET imaging of a patient with grade II breast cancer 1 week after administration of combination chemotherapy. (a) pretreatment and (b) posttreatment of a patient with lobular breast cancer who responded to treatment. (c) pretreatment and (d) posttreatment of a patient with invasive ductal breast cancer who did not respond to treatment [104].