Immunohistochemical Differences in Squamous Precancerous and Cancerous Lesions of the Oral Cavity and the Larynx: Preliminary Data

Preparation and Synergistic Anti-Tumor Effect of Iridium Oxide Nanocomposites under Microscope

In order to solve the great difficulties in cancer prevention, diagnosis, and treatment, a preparation method of iridium oxide nanocomposites under the microscope was proposed in this paper. Through a retrospective analysis of an experiment, IrOx nanoparticles were prepared by direct hydrothermal hydrolysis and loaded with chemotherapy drug adriamycin to construct nanodrug-loaded complex IrOx@DOX. At the same time, IrOx, as a sound-sensitive agent, can produce ROS under US irradiation, amplify intracellular oxidative stress, accelerate tumor cell death, and finally achieve the effect of SDT chemotherapy synergistic therapy. The experimental results show that IrOx@DOX has the dual response of pH and US, and the inhibition rates are 27%, 57%, and 76%, respectively. At the same time, ultrasound not only can enhance the uptake of nanoparticles by cells but also can promote the release of DOX in cells, which provides a basis for subsequent SDT chemotherapy synergistic therapy. Conclusion. Iridium oxide nanocomposite DOX combined with SDT can obtain a good therapeutic effect, which has positive feedback on the efficacy of chemotherapy and the therapeutic effect of cancer surgery.

Diagnostic Value of Spiral CT and Magnetic Resonance Imaging Scanning in Gastric Cancer and Precancerous Lesions

In order to explore the diagnostic value of spiral CT and magnetic resonance imaging scanning in gastric cancer and precancerous lesions, the author selected 56 gastric cancer patients treated in a medical center (group) as the experimental subjects, and all patients underwent MRI, multislice spiral CT scan, and enhanced CT scan two weeks before surgery; at the same time, the gastric cancer staging results of patients were diagnosed according to surgical pathology. All patients were examined under the condition of knowledge and performed breath-holding exercise before examination. The status, location, and extent of tumor lesions were evaluated. In comparison of T staging of gastric cancer patients with magnetic resonance scanning imaging and postoperative pathological examination results, among them, T staging of 3 patients did not match the results of pathological examination, the accuracy rates of T staging on magnetic resonance scanning imaging were T1 = 94.7%, T2 = 87.6%, T3 = 91.2%, and T4 = 94.7%, and the total accuracy was 92.1%. Comparison of helical CT scan imaging and postoperative pathological examination results is as follows. Among them, T staging of 8 patients did not match the results of pathological examination, 3 patients were ulcerative, 5 were protuberance, the accuracy rates of T staging in spiral CT scan imaging were T1 = 90.8%, T2 = 82.2%, T3 = 76.9%, and T4 = 87.6%, and the total accuracy was 84.5%. The total accuracy rate of imaging N staging was 77.5%, and the total accuracy rate of spiral CT scanning imaging N staging was 80.8%. The accuracy rates of M0 and M1 staging in magnetic resonance imaging were 100.0% and 96.5%, respectively, and the accuracy rates of M0 and M1 staging in spiral CT scan imaging were 96.5% and 96.5%, respectively. The accuracy rate of magnetic resonance imaging for the diagnosis of gastric cancer N staging was 77.4%, and the reason for the low accuracy rate was mainly because the enhancement effect was not obvious due to insufficient enhancement. The accuracy rate of spiral CT in diagnosing N staging of gastric cancer was 80.9%, which was mainly due to the small diameter of the middle celiac artery lymph nodes. Magnetic resonance and spiral CT scans have high value in the early diagnosis and staging of gastric cancer.