Influence of low-dose occupational radiation exposure on peripheral blood cells in radiation workers / 国际生物医学工程杂志

Objective:To investigate the effect of low-dose ionizing radiation on blood cell parameters of radiation workers.Methods:A total of 124 staff members engaged in radiology were selected into the observation group, and they were divided into 4 subgroups of physicians, physicists, technicians, and maintainer according to their jobs. A total of 130 non-radiation-related staff members from the same hospital were selected into the control group. Blood cell parameters of peripheral blood of all subjects from 2016 to 2019 were collected, and the differences in blood cell parameters between the radiation group and the control group as well as 4 subgroups of the control group were analyzed and compared, and the correlation between the differences in blood cell parameters and the cumulative radiation dose was compared.Results:Compared with the control group, the white blood cell count, neutrophil count, red blood cell count and hemoglobin count in the observation group were lower than those in the control group (all P<0.05). There are no significant differences in cumulative radiation dose among different types of work (all P>0.05). Correlation analysis showed that the blood cell parameters of peripheral blood cells were not significantly correlated with the cumulative radiation dose. The blood cell count changes after 4-year low-dose ionizing radiation between the physicist group, the technician group and the maintainer sub-group were significantly different (all P<0.05), but the above differences were not related to the cumulative radiation dose (all P>0.05). Conclusions:Under the same exposure and protection conditions, the blood cell counts of different radiation-related workers are not significantly different, and the long-term cumulative radiation dose has no significant correlation with blood cell parameters. Therefore, peripheral blood cell parameters can no longer be used as a good indicator to reflect radiation damage, and it is urgent to find more convenient, intuitive and sensitive indicators of radiation damage.

Pylori infection distribution in 11 096 individuals / 天津医药

Objective To investigate the distribution of Helicobacter pylori (Hp) infections among general population in Tianjin. Methods Individuals (n=11 096) who visited our hospital for medical examination and H. Pylori infection screen were included in the research objects. Rapid urease method was utilized to rapidly detect H. pylori infection among the popultion. Individuals were grouped based on their gender, age and occupations, and then were analyzed. Results H. pylori-positive rate was 30.52%(3 386/11 096) in 11 096 individuals, in which there were 34.77%(1 784/5 131) male and 26.86%(1 602/5 965) female respectively. Individuals were divided into 5 groups according to their ages:19 to 29 years old group, 30 to 39 years old group, 40 to 49 years old group, 50 to 59 years old group, 60 to 69 years old group and 70 to 92 years old group. The positive rates of H. pylori increased with age:19.50%( 379/1 944 ) in 19-29 years old group, 25.82%(650/2 517 ) in 30-39 years old group, 31.59%( 908/2 874 ) in 40-49 years old group, 37.48%(915/2 441 ) in 50-59 years old group, 41.09%( 353/859 ) in 60-69 years old group and 39.18%(181/462) in 70-92 years old group. The differences in positive rates between different age groups were all of statistically significant (P<0.05). Individuals were also divided into seven groups according to their occupations: medical worker group, worker group, teacher group, engineer group, clerk group, civil worker group and other career group. The positive rates of H. pylori infection were 25.42%(586/2 305), 29.35%(1 062/3 618), 30.61%(360/1 176), 32.49%(116/357), 33.44%(205/613), 34.52%(455/1 318)and 35.23%(602/1 709) respectively. The positive rate was 25.42% (586/2 305) medical workers, which was lower than that of other occupation groups with significant difference (P<0.002). Conclusion Good management of H. pylori diagnosis and treatment in mid-dle age and elderly together with popularizing knowledge of H.pylori prevention can effectively reduce H.pylori incidence.

Adenoid cystic carcinoma of the breast:report of 25 cases / 中华肿瘤杂志

<p><b>OBJECTIVE</b>To explore the clinical features, management approach and treatment outcomes for adenoid cystic carcinoma (ACC) of the breast.</p><p><b>METHODS</b>The clinicopathological data of 25 patients with breasts ACC treated in our hospital from years 1990 to 2012 were retrospectively reviewed and their prognosis was analyzed.</p><p><b>RESULTS</b>The median age of these 25 patients was 53 years (ranged from 31 to 81 years). With the exception of one male case, all patients were female including 17 cases of postmenopausal women. The most frequent presenting symptom is breast lumps, most (48.0%) were in the upper outer quadrant and areola area of the breast. Core needle biopsy was performed in five patients. The specimen finding were adenoids in three and invasive carcinoma in two cases. Axillary lymph node dissection was performed in 23 patients. Only two patients had histologically positive lymph nodes (3 of 14 and 2 of 20). Expression of ER and PR in 14 cases was detected by immunohistochemistry, showing one PR-positive and three ER-positive cases. The median follow-up of the 25 cases was 118 months (ranged from 12 to 244 months). Two patients died of lung metastases at 3 and 10 years after the surgery, respectively.</p><p><b>CONCLUSIONS</b>Due to the complexity of the histology of ACC, adequate sampling of specimens is essential for accurate diagnosis. ACC of the breast is a rare disease with a relatively good prognosis. The low incidence of axillary lymph node metastasis suggests that axillary node dissection is not recommended as a routine procedure. Breast ACC are often with negative ER and PR expression, and the value of adjuvant therapy needs to be further investigated.</p>

Application of two methods of high-risk HPV detection in early screening of uterine cervical cancer / 中国肿瘤临床

Objective:This study aims to select the more suitable testing method for early screening of uterine cervical cancer to protect susceptible populations. Application value was compared between the two methods of high-risk HPV detection in early screening of uterine cervical cancer. Methods:The two methods, namely, fluorescence quantitation polymerase chain reaction(PCR) and HC2-HPV-DNA, were used to detect the infection status of 13 high-risk HPV types during women's health examination. The examined women were divided into four groups according to age (23 to 29 years old, 30 to 39 years old, 40 to 49 years old, and 50 to 58 years old). Statistical methods were applied to analyze the results. Results:The detected positive rates by fluorescence quantitation PCR and HC2-HPV-DNA were 15.93%(140/879) and 11.83%(104/879), respectively, among the 879 examined women. The common positive and negative rates were 9.56%(84/879) and 81.80%(719/879), respectively. The results of the two methods showed that the infection positive rate was obviously higher in the 40 to 49 year old and 50 to 58 year old groups. Statistical difference was observed between fluorescence quantitation PCR and HC2-HPV-DNA in detecting high-risk HPV types (P40 years old who are at high risk of HPV, to prevent uterine cervical cancer efficiently.