Objective To summarize the clinicopathological characteristics and prognostic factors of salivary duct carcinoma(SDC)patients.Methods This study was reviewed and approved by the Ethics Committee,and informed consent was obtained from the patients.The clinical data of 30 SDC patients who were admitted to the Fourth Hospital of Hebei Medical University from 2014 to 2022,including case records,pathological diagnoses,immunohistochemical indicators,treatment methods,follow-up data,and other data,were retrospectively analyzed.SPSS 26.0 software was used to process the data and construct relevant curves.The chi-square test was used to analyze the correlation between different immunohistochemical indices and the recurrence and metastasis of SDC,and a single factor was used to ana-lyze clinical prognostic factors.Results Among the 30 SDC patients,the male-to-female ratio was 5∶1,with a median age of 61.5 years.Approximately 60％of cases occurred in the parotid gland,whereas the remainder occurred in the submaxillary gland,sublingual gland,or minor salivary gland.Among them,19 patients were androgen receptor-positive,23 patients were human epidermal growth factor receptor-2 positive,and 26 patients were Ki-67 positive.Postoperative follow-up was 18-94 months,with a median follow-up of 37 months.There were 13 cases of recurrence and 14 cases of distant metastasis.The 5-year overall survival rate was only 31.2％.The long-term survival of patients who underwent postoperative radiotherapy and chemoradiotherapy was better than that of patients who underwent surgery alone(P=0.027).T stage and lymph node invasion were associated with prognosis and survival(P＜0.05).There was a correlation between a Ki-67-positive cell count ≥ 40％and postoperative recurrence or metastasis(P=0.025).Conclusion Radi-cal surgery combined with postoperative radiotherapy and chemoradiotherapy is helpful for improving long-term overall survival,and tumor T stage and lymph node metastasis may be the main factors affecting the prognosis of patients with SDC.Patients with Ki-67-positive cell counts ≥ 40％are prone to postoperative recurrence or metastasis.

Objective:To investigate the reasonable airflow organization and exhaust system facilities during the operation of the inspection workshop, and solve the problem of the accumulation of harmful gases such as ozone and nitrogen oxides in the workshop.Methods:In May 2023, computational fluid dynamics (CFD) technology was used to numerically simulate the diffusion of ozone and nitrogen oxides generated by industrial radiographic inspection operations, and the comparative detection method was used to analyze the ozone and nitrogen oxides concentrations before and after the renovation of the ventilation system of the inspection workshop.Results:After the renovation of ventilation system, the average concentration of ozone in the inspection workshop decreased from 0.81 mg/m 3 to 0.03 mg/m 3, and the average concentration of nitrogen oxides decreased from 0.42 mg/m 3 to 0.01 mg/m 3, and the differences were statistically significant ( t=20.51, 10.38, P<0.001) . Conclusion:The ventilation facilities of the inspection workshop are set up in the airflow organization mode of sending up and down the exhaust, and the ventilation pipes are scientifically designed through the calculation of ventilation hydraulic balance, which can effectively control the concentration of harmful gases in the inspection workshop.

Objective:To investigate the reasonable airflow organization and exhaust system facilities during the operation of the inspection workshop, and solve the problem of the accumulation of harmful gases such as ozone and nitrogen oxides in the workshop.Methods:In May 2023, computational fluid dynamics (CFD) technology was used to numerically simulate the diffusion of ozone and nitrogen oxides generated by industrial radiographic inspection operations, and the comparative detection method was used to analyze the ozone and nitrogen oxides concentrations before and after the renovation of the ventilation system of the inspection workshop.Results:After the renovation of ventilation system, the average concentration of ozone in the inspection workshop decreased from 0.81 mg/m 3 to 0.03 mg/m 3, and the average concentration of nitrogen oxides decreased from 0.42 mg/m 3 to 0.01 mg/m 3, and the differences were statistically significant ( t=20.51, 10.38, P<0.001) . Conclusion:The ventilation facilities of the inspection workshop are set up in the airflow organization mode of sending up and down the exhaust, and the ventilation pipes are scientifically designed through the calculation of ventilation hydraulic balance, which can effectively control the concentration of harmful gases in the inspection workshop.

Objective: To explore the effect of perioperative chemotherapy on the prognosis of gastric cancer patients under real-world condition. Methods: A retrospective cohort study was carried out. Real world data of gastric cancer patients receiving perioperative chemotherapy and surgery + adjuvant chemotherapy in 33 domestic hospitals from January 1, 2014 to January 31, 2016 were collected. Inclusion criteria: (1) gastric adenocarcinoma was confirmed by histopathology, and clinical stage was cT2-4aN0-3M0 (AJCC 8th edition); (2) D2 radical gastric cancer surgery was performed; (3) at least one cycle of neoadjuvant chemotherapy (NAC) was completed; (4) at least 4 cycles of adjuvant chemotherapy (AC) [SOX (S-1+oxaliplatin) or CapeOX (capecitabine + oxaliplatin)] were completed. Exclusion criteria: (1) complicated with other malignant tumors; (2) radiotherapy received; (3) patients with incomplete data. The enrolled patients who received neoadjuvant chemotherapy and adjuvant chemotherapy were included in the perioperative chemotherapy group, and those who received only postoperative adjuvant chemotherapy were included in the surgery + adjuvant chemotherapy group. Propensity score matching (PSM) method was used to control selection bias. The primary outcome were overall survival (OS) and progression-free survival (PFS) after PSM. OS was defined as the time from the first neoadjuvant chemotherapy (operation + adjuvant chemotherapy group: from the date of operation) to the last effective follow-up or death. PFS was defined as the time from the first neoadjuvant chemotherapy (operation + adjuvant chemotherapy group: from the date of operation) to the first imaging diagnosis of tumor progression or death. The Kaplan-Meier method was used to estimate the survival rate, and the Cox proportional hazards model was used to evaluate the independent effect of perioperative chemo therapy on OS and PFS. Results: 2 045 cases were included, including 1 293 cases in the surgery+adjuvant chemotherapy group and 752 cases in the perioperative chemotherapy group. After PSM, 492 pairs were included in the analysis. There were no statistically significant differences in gender, age, body mass index, tumor stage before treatment, and tumor location between the two groups (all P>0.05). Compared with the surgery + adjuvant chemotherapy group, patients in the perioperative chemotherapy group had higher proportion of total gastrectomy (χ(2)=40.526, P<0.001), smaller maximum tumor diameter (t=3.969, P<0.001), less number of metastatic lymph nodes (t=1.343, P<0.001), lower ratio of vessel invasion (χ(2)=11.897, P=0.001) and nerve invasion (χ(2)=12.338, P<0.001). In the perioperative chemotherapy group and surgery + adjuvant chemotherapy group, 24 cases (4.9%) and 17 cases (3.4%) developed postoperative complications, respectively, and no significant difference was found between two groups (χ(2)=0.815, P=0.367). The median OS of the perioperative chemotherapy group was longer than that of the surgery + adjuvant chemotherapy group (65 months vs. 45 months, HR: 0.74, 95% CI: 0.62-0.89, P=0.001); the median PFS of the perioperative chemotherapy group was also longer than that of the surgery+adjuvant chemotherapy group (56 months vs. 36 months, HR=0.72, 95% CI:0.61-0.85, P<0.001). The forest plot results of subgroup analysis showed that both men and women could benefit from perioperative chemotherapy (all P<0.05); patients over 45 years of age (P<0.05) and with normal body mass (P<0.01) could benefit significantly; patients with cTNM stage II and III presented a trend of benefit or could benefit significantly (P<0.05); patients with signet ring cell carcinoma benefited little (P>0.05); tumors in the gastric body and gastric antrum benefited more significantly (P<0.05). Conclusion: Perioperative chemotherapy can improve the prognosis of gastric cancer patients.
Chemotherapy, Adjuvant ; Female ; Gastrectomy ; Humans ; Male ; Neoadjuvant Therapy ; Neoplasm Staging ; Prognosis ; Retrospective Studies ; Stomach Neoplasms/surgery*

Objective:To investigate the clinical effect of water-jet excision combined with skin graft in the treatment of giant congenital melanotic nevus.Methods:The patients with giant nevus who were admitted to the Department of Plastic Surgery, Chinese PLA General Hospital from January 2015 to May 2019 were retrospectively analyzed. All patients were treated by layer-by-layer cutting of giant nevus with water-jet, preserving the subcutaneous fascial layer and part of the dermis as much as possible, then following by skin graft transplantation. The patients visited the hospital 1-2 years after operation. The postoperative scar of skin graft area was scored by Patient and Observer Scar Assessment Scale (POSAS), and the satisfaction of skin graft area was evaluated by digital scoring method (1-10 points). The recurrence of nevus pigmentosus and implantation metastasis were observed. Descriptive method were used for statistical analysis.Results:A total of 7 children were included, 2 males and 5 females, aged 4 to 14 years. There were 3 cases on the trunk and 4 cases on the extremities. Giant nevi accounted for (7.4 ± 3.1)% of the body surface area. Then skin graft survived well after surgery in all 7 children. During the 1-year follow-up after operation, the POSAS score of skin graft scar showed that the sum of 1-3 points in the scores of scar pain, itching, hardness and thickness by the patients or their families was 6, 4, 4 and 5 cases, respectively, and the sum of 4-10 points in the pigmentation and irregularity was 5 and 5 cases, respectively. None of the 7 patients had functional limitation in the skin graft area; the physicians’, scores for vascularity, pigmentation, thickness, and flexibility of the scars in the skin graft area were low, with a sum of 6, 3, 4, and 4 for the number of cases with 1-3 points and 2 and 4 for the number of cases with 1-3 points and 4-6 points in the flatness score, respectively. The satisfaction of both doctors and patients (sum of 7-10 points) was 4 and 5 cases, respectively. 7 cases were reexamined 1 year after operation, with recurrence of 2 punctate nevus pigmentosus(less than 1 mm in diameter) in only one case. No implantation metastasis in the skin graft area of nevus pigmentosus happened.Conclusions:Water-jet excision combined with skin graft in the treatment of giant nevus is simple and only one procedure required. The donor site only needs to cut a split-thickness skin graft. The postoperative scar is not obvious and the skin elasticity is better. Patients were relatively satisfied with the postoperative effect. It is suitable for the resection of nevus pigmentosus in the trunk especially the nevus pigmentosus with good texture and lighter color but not for the lesion at articular area of limbs.

Objective:To investigate the clinical effect of water-jet excision combined with skin graft in the treatment of giant congenital melanotic nevus.Methods:The patients with giant nevus who were admitted to the Department of Plastic Surgery, Chinese PLA General Hospital from January 2015 to May 2019 were retrospectively analyzed. All patients were treated by layer-by-layer cutting of giant nevus with water-jet, preserving the subcutaneous fascial layer and part of the dermis as much as possible, then following by skin graft transplantation. The patients visited the hospital 1-2 years after operation. The postoperative scar of skin graft area was scored by Patient and Observer Scar Assessment Scale (POSAS), and the satisfaction of skin graft area was evaluated by digital scoring method (1-10 points). The recurrence of nevus pigmentosus and implantation metastasis were observed. Descriptive method were used for statistical analysis.Results:A total of 7 children were included, 2 males and 5 females, aged 4 to 14 years. There were 3 cases on the trunk and 4 cases on the extremities. Giant nevi accounted for (7.4 ± 3.1)% of the body surface area. Then skin graft survived well after surgery in all 7 children. During the 1-year follow-up after operation, the POSAS score of skin graft scar showed that the sum of 1-3 points in the scores of scar pain, itching, hardness and thickness by the patients or their families was 6, 4, 4 and 5 cases, respectively, and the sum of 4-10 points in the pigmentation and irregularity was 5 and 5 cases, respectively. None of the 7 patients had functional limitation in the skin graft area; the physicians’, scores for vascularity, pigmentation, thickness, and flexibility of the scars in the skin graft area were low, with a sum of 6, 3, 4, and 4 for the number of cases with 1-3 points and 2 and 4 for the number of cases with 1-3 points and 4-6 points in the flatness score, respectively. The satisfaction of both doctors and patients (sum of 7-10 points) was 4 and 5 cases, respectively. 7 cases were reexamined 1 year after operation, with recurrence of 2 punctate nevus pigmentosus(less than 1 mm in diameter) in only one case. No implantation metastasis in the skin graft area of nevus pigmentosus happened.Conclusions:Water-jet excision combined with skin graft in the treatment of giant nevus is simple and only one procedure required. The donor site only needs to cut a split-thickness skin graft. The postoperative scar is not obvious and the skin elasticity is better. Patients were relatively satisfied with the postoperative effect. It is suitable for the resection of nevus pigmentosus in the trunk especially the nevus pigmentosus with good texture and lighter color but not for the lesion at articular area of limbs.

In this study, Andrographis paniculata seedlings were used as experimental materials to study the effects of salicylic acid(SA) on the growth and effective component accumulation of A. paniculata under NaCl stress. The results showed that with the increase of NaCl concentration, the growth of A. paniculata seedlings was significantly inhibited, and the content of carotene and carotenoid decreased. The activity of antioxidant enzyme was enhanced. At the same time, the contents of proline, proline and soluble protein were on the rise. The contents of andrographolide, new andrographolide and deoxyandrographolide showed an upward trend, while deoxyandrographolide showed a downward trend. Treatment with 100 mmol·L~(-1) NaCl+5 mg·L~(-1) SA showed a significant increase in antioxidant enzyme activity in A. paniculata leaves. Treatment with 100 mmol·L~(-1) NaCl+10 mg·L~(-1) SA showed significant changes in soluble protein and proline content in A. paniculata leaves, while MDA content in A. paniculata leaves significantly decreased. 10 mg·L~(-1) SA had the best effect on the growth of A. paniculata seedlings under salt stress. Under the treatment of 50 mmol·L~(-1) NaCl+10 mg·L~(-1) SA, fresh weight, dry weight and leaf dry weight of A. paniculata seedlings reached the highest level, which were 1.02, 1.09 and 1.11 times of those in the control group, respectively. The concentrations of NaCl and 10 mg·L~(-1) SA were significantly higher than those of the control group. Four key enzyme genes of A. paniculata diterpene lactone synthesis pathway were selected to explore the molecular mechanism of salicylic acid to alleviate salt stress. With the increase of salt stress, the relative expressions of HMGR, GGPS and ApCPS were up-regulated, indicating that salt stress may enhance the synthesis of A. paniculata diterpene lactone through MVA pathway. SA can effectively promote the growth and development of A. paniculata under salt stress, improve its osmotic regulation and antioxidant capacity, improve its salt tolerance, and alleviate the effects of salt stress on A. paniculata.
Andrographis ; Plant Leaves ; Salicylic Acid ; Salt Tolerance ; Seedlings/genetics*

Objective To understand the breeding situation of Histiostoma feroniarum in Chinese herbal medicine Rhizoma Zingiberis. Methods The Rhizoma Zingiberis sold on the market was selected and brushed. The dust from Rhizoma Zingiberis was screened under a microscope to search the mites. The mites were made into specimens to identify the species. Results The mites were H. feroniarum. Totally 14 mites were found in 100 g dust sample,with the density of breeding of 0.14/g. Conclusion H. feroniarum could breed in Chinese herbal medicine Rhizoma Zingiberis,and the prevention and control measures should be adopted.

Objective To observe the morphological characteristics of hypopus of Acarus siro in the stored wheat in Linquan County,Anhui Province. Methods The wheat samples were collected from the wheat which had been stored for more than six months. The hypopodes of A. siro were isolated from the stored wheat,and were made into the glass specimens,and then were identified under an optical microscope. Results The structural features of the hypopus were found under the microscope,such as the setae of tibia and setae of genu,and the foot claws were well-developed,and the genital seta bases and the pair of sucker were almost at the same baseline. Conclusion The hypopodes of A. siro are found in the stored wheat,and therefore,the effec-tive measures should be taken to control the hazard to the stored grain.

Objective To investigate the pollution status of Gohieria fusca in the air conditioner-filters of different places in Wuhu City. Methods The dust samples were collected from the filters of air-conditioners in dining rooms,shopping malls,ho-tels and households between June and September,2013,and G. fusca was detected in the dust samples. Results There were 430 dust samples collected and 98 were G. fusca positive with the breeding rate of 22.79%. The difference of breeding rates of G. fusca were statistically significant among the different places(χ2=18.294,P<0.05). Among 510.5 g dust samples in total, 783 G. fusca mites were detected with an average breeding density of 1.53 mite/g. Conclusion G. fusca breeds in the dust of air-conditioner filters in Wuhu City gravely.