简介：AbstractObjective:This study was performed to evaluate the clinical and epidemiological characteristics of inpatients with malignant skin tumors in western Inner Mongolia during the past 10 years.Methods:We collected the clinical data of inpatients with histopathologically diagnosed malignant skin tumors admitted to the Affiliated Hospital of Inner Mongolia Medical University from June 2008 to December 2018. Morbidity was compared using the Chi-square test.Results:In total, 340 inpatients with malignant skin tumors were evaluated, including 163 (47.94%) patients with basal cell carcinoma, 134 (39.41%) with squamous cell carcinoma, 5 (1.47%) with malignant melanoma, 21 (6.18%) with Bowen disease, and 6 (1.76%) with Paget’s disease. Four (1.18%) patients had metastatic skin cancer and seven (2.06%) had other malignant skin tumors. The patients comprised 132 (38.8%) men and 208 (61.1 %) women, and there were no statistically significant sex-related differences among the skin malignancies (x2 = 5.006, P > 0.05). Among the 340 patients, 314 (92.4%) were of Han nationality and 26 (7.6%) were of ethnic minorities. Statistically significant differences were found in the various types of malignant skin tumors between the Han and minority groups (x2 = 19.446, P < 0.05). Among the selected patients, 61.76% were farmers and herdsmen, and the sites mainly affected were the head, face, neck, trunk, limbs, and vulva.Conclusion:The incidence of malignant skin tumors in western Inner Mongolia has substantially increased during the past decade, especially in the past 2 years. Therefore, we should increase the awareness of prevention and treatment of malignant skin tumors to achieve early diagnosis and treatment effects.

简介：摘要：GRG材料以其超强的造型能力，广泛应用于剧场建筑中。在内蒙古群艺馆项目中，观众厅的装修设计选用了GRG材料，对GRG材料进行了防火检测、力学检测和声学检测，形成数据分析，以及对天花吊顶转换荷载的计算，给实际的施工工程提供了数据参考。在计算的基础上，实施GRG施工做法，最终形成良好的装饰效果与声学效果。

简介：AbstractObjective:To determine anatomic relationships and variation of the round window membrane to bony surgical landmarks on computed tomography.Study design:Retrospective imaging review.Methods:100 temporal bone images were evaluated. Direct measurements were obtained for membrane position. Vector distances and angulation from umbo and bony annulus were calculated from image viewer software coordinates.Results:The angle of round window membrane at junction with cochlear basal turn was (42.1 ± 8.6)°. The membrane’s position relative to plane of the facial nerve through facial recess was (14.7 ± 5.2)° posterior from a reference line drawn through facial recess to carotid canal. Regarding transtympanic drug delivery, the round window membrane was directed 4.1 mm superiorly from the inferior annulus and 5.4 mm anteriorly from the posterior annulus. The round window membrane on average was angled superiorly from the inferior annulus (77.1 ± 27.9)° and slightly anteriorly from the posterior annulus (19.1 ± 11.1°). The mean distance of round window membrane from umbo was 4 mm and posteriorly rotated 30° clockwise from a perpendicular drawn from umbo to inferior annulus towards posterior annulus. Together, these measurements approximate the round window membrane in the tympanic membrane’s posteroinferior quadrant.Conclusions:These radiologic measurements demonstrate normal variations seen in round window anatomy relative to facial recess approach and bony tympanic annulus, providing a baseline to assess round window insertion for cochlear implantation and outlines anatomic factors affecting transtympanic drug delivery.