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@#AIM: To investigate on myopia and related influencing factors between adolescents aged 6-18 years in Chengdu and Mianyang Area of Sichuan Province.<p>METHODS: This cross-sectional stratified sampling study collected 4 071 students aged 6-18 years from October 2017 to May 2018 in Chengdu and Mianyang City of Sichuan Province. All students underwent ocular examination and performed questionnaire survey. <p>RESULTS: Totally 3 857(94.74%)students were participated in this study with a mean age of 11.86±3.43 years. The prevalence rate of myopia and high myopia students were 61.21% and 3.89%, respectively. The prevalence rate of myopia students were 12.05% in the 6-year-old group and 86.15% in the 18-year-old group. Prevalence rates of students with uncorrected and presenting VA≤4.7 in the better eye were 42.88%, 12.37%, respectively. Among all students, 48.07% were wearing glasses. In multivariate Logistic regression analysis, age, parental myopia, near work, using electronic equipment were the risk factors for myopia, outdoor activities was protective factors. <p>CONCLUSION: The main reason for the low vision of school children in Chengdu and Mianyang Area in China is myopia. Prevalence rate of myopia students is gradually increasing with the growing of age. Myopia was associated with age, parental myopia, near wok, using electronic equipment and outdoor activities.
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<p><b>OBJECTIVE</b>To assess the accuracy of detection by automated breast volume scanner (ABVS) in diagnosis of high-risk and small breast lesions.</p><p><b>METHODS</b>One hundred and twelve patients with solid high-risk and small breast lesions were identified by ABVS. The patients were divided into benign lesion group and cancer group after pathological examination. The clinicopathological findings and ultrasonographic features of the lesions were compared.</p><p><b>RESULTS</b>Among the 112 lesions there were 49 benign and 63 malignant lesions. The mean size on ABVS and pathology were (1.59 ± 0.52) cm and (1.52 ± 0.58) cm. There was no significant difference in tumor sizes determined by ABVS and pathology (P = 0.194). The mean age of patients with benign lesions was (38.5 ± 7.4) years and that of malignant lesions was (52.4 ± 13.6) years, showing a significant difference between the two groups (P < 0.001) . The mass shape, orientation, margin, lesion boundary, echo pattern, calcification, BI-RADS category and retraction phenomenon were significantly different of the malignant and benign masses (P < 0.05). But there was no significant difference in the location of lesions and posterior acoustic features (P > 0.05) . Retraction phenomenon was significantly associated with pathological type and histologic grade of the breast cancer (P < 0.01). The specificity, sensitivity and accuracy of retraction phenomenon were 100% (46/46), 73.0% (46/63), and 84.8% (95/112), respectively.</p><p><b>CONCLUSIONS</b>ABVS provides advantages of better size prediction of high-risk and small breast lesions. Furthermore, the retraction phenomenon in coronal plane shows high specificity and sensitivity in detecting breast cancer.</p>