Vitamin D is an essential nutrient that regulates numerous cellular pathways. Many cell signaling pathways activated by vitamin D are related with cancer development, progression and prognosis (Xu et al., 2020;Wang et al., 2018). Vitamin D deficiency increases the risk of fracture risk, cardiovascular disease, hypertension,

AIM:To study the clinical significance of the diagnosis and catheterized interventional treatment of digital subtraction angiography (DSA) for pancreatic tumors.METHODS: Ninety-two patients with pancreatic tumor, 69 males and 23 females, aged from 41 to 70 years (mean 57.1 years) were diagnosed with DSA. Sixty-one patients with pancreatic cancer were treated with transcatheter celiac and superior mesenteric arterial anticancer agents (MMC 20mg, EADM 40mg and 5-FU 2.0g) infusion (TCSAI).RESULTS: The DSA diagnoses were confirmed by operations and pathological examinations, with a coincidence 82.6% rate of, and a therapeutic effective rate of 42.6%.CONCLUSION: DSA is of diagnostic value for pancreatic tumors, and helpful in understanding the course of the disease, judging the prognosis and selecting the therapeutic regimen, and could improve the chemotherapeutic effect as well.

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The production and quality control technique of high density polyethylene (HDPE) pipe used in trench-less installation, especially quick test of HDPE materials and HDPE pipes by simple experimental method was introduced in this paper. So that the quality of HDPE pipe product can be effectively controlled, avoiding the property loss of the pipe due to trench-less installation, ensuring the 50 years service life of the pipe.