: Lung adenocarcinoma (LUAD) is the common histological subtype of non-small-cell lung carcinoma (NSCLC). Circular RNAs (circRNAs) represent a new class of non-coding RNAs (ncRNAs) involved in the development of cancer. Accumulating evidence indicated that a large number of circular RNAs were found to be involved in many biological processes, including tumor initiation, proliferation and progression. These circRNAs present great potentials as new biomarkers and vital targets for disease diagnosis and prognosis. In this review, we mainly focus on the differentially expressed circRNAs and their functions in the pathogenesis of LUAD, which makes it possible for the utility of circRNAs as novel biomarkers for early diagnosis and therapy. Especially, it is helpful to develop circRNAs as crucial therapeutic targets, thus providing a promising biomedical application in the field of cancer gene therapy.

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ObjectiveFor 1–4 cm differentiated thyroid cancer (DTC), current ATA guideline recommended hemithyroidectomy (HT) as an acceptable alternative initial procedure to total or near‐total thyroidectomy (TT). The aim of this study was to evaluate benefits and harms of HT, TT in 1–4 cm DTC.DesignRetrospective cohort study.PatientsDTC patients aged 18 years or older who underwent initial thyroidectomy in a tertiary medical centre were included from January 2008 to July 2018.MeasurementsThe structural persistent/recurrent disease, reoperation rates and surgical complications were compared using Cox proportional regression and logistic regression. Propensity score matching was performed to adjust for related clinicopathological variables.ResultsAmong 1824 DTC patients, 795 patients sized 1–4 cm were included. A total of 286 patients underwent HT and 509 patients underwent TT. In the matched analysis, no significant difference in disease‐free survival (DFS) between HT and TT was observed during the median follow‐up period of 56.5 months (hazard ratio [HR] 0.86; 95% CI, 0.37–2.00; p = .733). The difference in DFS between two groups was consistent regardless of age, sex, tumour size, follow‐up duration. Meanwhile, HT was associated with a decreased risk of surgical complications (odds ratio [OR] 0.47, 95% CI 0.31–0.71, p < .001), as well as lower proportion of levothyroxine replacement (p = .007). Two cases in HT group received reoperation. Further multivariate analysis showed surgical procedure was not associated with structural persistence/recurrence (HR 0.68; 95%CI, 0.29–1.58, p = .367).ConclusionsFor patients with 1–4 cm DTC without clinical evidence of lymph node metastasis or extrathyroidal extension, HT was associated with lower risk of surgical complications than TT while provided similar benefits as TT.

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