Other high-frequency co-occurring keyword groups include “macrophages, mechanotransduction, activation, Piezo1, cancer” and “TNF-α, upregulation.” Keyword analysis was also conducted in the Scopus database, and the results showed that its high-frequency keywords centered on experimental method terms such as “human,” “human cell,” “article,” and “animal experiment.” This is precisely related to the relatively lenient inclusion policy of the Scopus database mentioned earlier, which leads to the inclusion of keywords from a large number of non-high-quality studies. This evidence concerns the gene TNF and cancer.