PMID- 33414909 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20210111 IS - 2049-9450 (Print) IS - 2049-9469 (Electronic) IS - 2049-9450 (Linking) VI - 14 IP - 2 DP - 2021 Feb TI - Relationship between adverse events associated with lenvatinib treatment for thyroid cancer and patient prognosis. PG - 28 LID - 10.3892/mco.2020.2190 [doi] LID - 28 AB - Tyrosine kinase inhibitors (TKIs) were first approved for treating radioactive iodine-refractory differentiated thyroid cancer (DTC) and anaplastic thyroid cancer (ATC) 5 years ago. Among them, lenvatinib has a high response rate and has become the first-line drug for treating thyroid cancer. Although it has a high response rate, it is also characterized by a high frequency of adverse events (AEs). AEs previously reported in a phase II study occurred after the practical application of TKI therapy. However, the type and frequency of AEs that occurred were significantly different. The present study investigated the type and frequency of AEs in the real-world setting and examined their relationship with prognosis. Between June 2015 and May 2020, 111 patients (79 patients with DTC and 32 patients with ATC) were treated with lenvatinib. An investigation of lenvatinib AEs, including fatal events, revealed that fistula formation or severe tumor regrowth after the discontinuation of treatment was an AE associated with poor prognosis. In total, 11 patients with ATC (34.4%) and 7 patients with DTC (8.9%) developed skin fistula. The mortality rate among these patients was 38.9% (7/18), including three deaths caused by major bleeding and four deaths attributable to mediastinitis or pneumonia. In the DTC group, irreversible regrowth occurred in all 7 patients who required drug withdrawal because of AEs, and all patients died. Conversely, overall survival was longer among patients with DTC and hand-foot syndrome (HFS). Therefore, the present study illustrated that although lenvatinib therapy can result in severe AEs requiring dose reduction or treatment discontinuation, the HFS appearance portends a good prognosis in patients treated with lenvatinib. CI - Copyright: (c) Iwasaki et al. FAU - Iwasaki, Hiroyuki AU - Iwasaki H AD - Department of Breast and Endocrine Surgery, Kanagawa Cancer Center, Yokohama, Kanagawa 241-8515, Japan. FAU - Toda, Soji AU - Toda S AD - Department of Breast and Endocrine Surgery, Kanagawa Cancer Center, Yokohama, Kanagawa 241-8515, Japan. FAU - Murayama, Daisuke AU - Murayama D AD - Department of Breast and Endocrine Surgery, Kanagawa Cancer Center, Yokohama, Kanagawa 241-8515, Japan. FAU - Kato, Shin AU - Kato S AD - Department of Breast and Endocrine Surgery, Kanagawa Cancer Center, Yokohama, Kanagawa 241-8515, Japan. FAU - Matsui, Ai AU - Matsui A AD - Department of Breast and Endocrine Surgery, Kanagawa Cancer Center, Yokohama, Kanagawa 241-8515, Japan. LA - eng PT - Journal Article DEP - 20201216 PL - England TA - Mol Clin Oncol JT - Molecular and clinical oncology JID - 101613422 PMC - PMC7783723 OTO - NOTNLM OT - adverse event OT - hand-foot syndrome OT - lenvatinib OT - prognosis OT - retrospective study OT - thyroid cancer EDAT- 2021/01/09 06:00 MHDA- 2021/01/09 06:01 PMCR- 2020/12/16 CRDT- 2021/01/08 06:11 PHST- 2020/07/02 00:00 [received] PHST- 2020/11/03 00:00 [accepted] PHST- 2021/01/08 06:11 [entrez] PHST- 2021/01/09 06:00 [pubmed] PHST- 2021/01/09 06:01 [medline] PHST- 2020/12/16 00:00 [pmc-release] AID - MCO-0-0-02190 [pii] AID - 10.3892/mco.2020.2190 [doi] PST - ppublish SO - Mol Clin Oncol. 2021 Feb;14(2):28. doi: 10.3892/mco.2020.2190. Epub 2020 Dec 16.