Objective : To explore the correlation between oral mucosal lichen planus and Helicobacter pylori infection by analyzing the infection status of Helicobacter pylori in patients with oral mucosal lichen planus. Methods: 14C- urea breath test was done in 69 patients with oral lichen planus and 28 patients with chronic inflammation of oral mucosa. Detection of serum anti Helicobacter pylori antibody was done in 32 patients (23 with oral lichen planus and 9 with chronic inflammation of oral mucosa) at the same time. Results : The positive rate of 14C-urea breath test was 68.12% in patients with oral lichen planus and 46.43% in chronic inflammation of oral mucosa. There was significant difference between the 2 groups (χ2=3.970, P=0.046). The positive rate of anti Helicobacter pylori antibody was 52.17% in patients with oral lichen planus and 22.22% in chronic inflammation of oral mucosa, and there was no significant difference between the 2 groups (χ2=2.358, P=0.125). Conclusion The prevalence of Helicobacter pylori infection in patients with oral lichen planus is higher, and there is a relevance between oral lichen planus and Helicobacter pylori infection.

Objective: To investigate the clinical effect of dissection in the upper part of parotid gland benign tumor using a tragus edge combined retroauticular hairline incision approach. Methods: 20 cases of upper part of parotid gland benign tumor were resected using the tragus edge combined retroauticular hairline incision approach, the surgery and cosmetic effect were analyzed. Results: Parotid gland tumors were checked by CT before the operation and diagnosed by frozen section analysis during the operation. The tumors were successfully complete resected in all cases. There were no complications of Frey’s syndrome, postoperative bleeding, and flap necrosis, 2 cases showed a temporary earlobe numbness, 1 case of temporary facial nerve paralysis and 1 case of salivary fistula. There were no tumor recurrence after 24 ~ 48 months followed up. Surgical incision cosmetic effect is satisfactory. Conclusion The tragus edge combined retroauticular hairline incision is safe and feasible, with less complications for the upper part of parotid gland benign tumor resecetion.

Amyloidosis of salivary glands is a rare disease. The case of a 62-year-old male patient with 20 years of progressive swelling of the floor of the mouth and raising of the tongue that impacted the swallowing, phonation, and tongue movement of the patient is reported in this paper. Clinical examination revealed a large mass in the floor of the mouth. The lip and cheek mucosae had a considerable number of hard, soybean-sized, light-yellow nodules. The surgical removal of the mass under and in front of the tongue was performed. A pathology examination and Congo red staining confirmed the diagnosis of amyloidosis of the submandibular glands and sublingual glands. No recurrence was observed after 5 years of follow-up. The literature on the relevant problems was reviewed.

Objective: To investigate the expression and significance of NF-κB in oral squamous cell carcinoma and paracancerous tissues. Methods: Cancerous and paracancerous tissues about 5 mm outside the tumor boundary were cut from 47 patients with OSCC. NF-κB expression in these tissues were detected by the immunohistochemical SP method and compared with that in 32 normal oral mucosa tissues. Results : The average optical density (OD value) of immunohistochemical-positive cells in cancer tissues and paracancerous tissues was higher than that in normal tissues, and the difference was statistically significant (P < 0.001). There was no significant difference in the OD values between cancer tissues and paracancerous tissues (P=0.356). The rate of NF-κB positive expression in cancer tissue and paracancerous tissue was significantly higher than that in normal mucosa tissue, and the difference was statistically significant (P < 0.001). There was no significant difference in the rate of NF-κB positive expression between cancer tissues and paracancerous tissues (P=0.117), but the rate of moderate-to-strong positive expression in cancer tissues was significantly higher than that in paracancerous tissues (P < 0.001). Conclusion NF-κB may be involved in the development of OSCC.