[Association between mild cognitive impairment and all-cause mortality in elderly population in China: a Meta analysis].

To quantitatively evaluate the association between mild cognitive impairment and all-cause mortality. The research papers of the association between cognitive impairment and all-cause mortality in the elderly in the databases of PubMed, EMBASE, Wang Fang data and CNKI published as of August 1, 2021 were comprehensively retrieved. Software R 4.

An exploratory study on the checkout rate of circulating tumor cells and the prediction of efficacy of neoadjuvant therapy and prognosis in patients with HER-2-positive early breast cancer.

Background: Neoadjuvant therapy is a standard treatment for patients with large, nonmetastatic breast cancer and may allow breast-conserving surgery after tumor downsizing while decreasing the risk of subsequent relapse. Dynamic changes of circulation tumor cells (CTCs) have a role in predicting treatment efficacy of breast cancer. However, the relationship between CTC enumeration before neoadjuvant therapy and pathologic complete response rate is still uncertain.

[Electron microscopic observation of vocal fold polyps].

Objective: The purpose of this study was to observe the ultrastructure of the fibroblasts, collagen and elastic fibers in vocal fold polyps.

Methods: Ten vocal fold polyps and 3 normal vocal fold specimens obtained from total laryngectomy were studied by means of transmission electron microscope and scanning electron microscope.

Results: The result showed that in vocal fold polyps, the quantity of fibroblasts increased and there were abundant organelles, suggesting that the fibroblast were in the status of activation.