“… 19 , 20 , 21 , 22 , 23 Because of the unique advantages of saliva testing, such as noninvasiveness, pain-free, ease of collection, and affordability, compared to histopathology, immunohistochemistry, and other diagnostic methods, it has been widely utilized to diagnose numerous cancers. 24 , 25 , 26 , 27 , 28 Our results showed that the salivary BMI-1 levels in SACC patients with local invasion or distant metastasis were significantly higher than in SACC patients without invasion or metastasis. These results were consistent with the findings in tumor tissues of endometrial adenocarcinoma, gastric cancer, and pancreatic cancer.…”